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Home Gravitas - Ultemate Vac Acrylic
GravitasSKU: TTP1

Gravitas - Ultemate Vac Acrylic

€200,00 €140,00 / Sale Sold out
Tax not included. Shipping calculated at checkout.
4.92 (13 reviews)
Nib: Steel
Nib Size: Extra Fine
Gravitas - Ultemate Vac Acrylic
€200,00 €140,00 /
Nib: Steel
Nib Size: Extra Fine

 
 
This item is a deferred, subscription, or recurring purchase. By continuing, I agree to the cancellation policy and authorize you to charge my payment method at the prices, frequency and dates listed on this page until my order is fulfilled or I cancel, if permitted.
Description

Introducing the Gravitas Ultemate Vac, a groundbreaking design and Gravitas' inaugural venture into complex filling systems. This fountain pen redefines durability, incorporating titanium in key areas to ensure longevity, addressing common weaknesses found in other vacuum pens. 

The design emphasizes the utilization of exceptionally durable materials to ensure longevity. Titanium is strategically employed to reinforce vulnerable areas where other vacuum pens may falter. Despite its robust construction, the pen remains lightweight, featuring a transparent acrylic section that enables you to monitor the ink level in the second chamber.

Despite its robust construction, the fountain pen remains lightweight, featuring a transparent Ultem section that allows for easy monitoring of ink levels in the secondary chamber. Easy to clean and maintain since the whole design is put together using threads and gaskets, different from other vacuum pens assembled using glue.

The 25mm-long section, tapering from 11.9mm to 10.2mm in width, provides a comfortable grip that is well known by fountain pen users - the hour glas shape. The nib is a steel size #6 designed and manufactured by Gravitas - paired with abs plastic feeder.

With a generous capacity exceeding 2.5ml and a secondary chamber holding 0.7ml, the Ultemate Vac offers ample ink for extended writing sessions. The second chamber is equipped with a shut-off valve to prevent ink mishaps, ensuring a mess-free experience. When using the Ultimate Vac it is recommended for the end knob to be unscrewed, thus offering a more constant and wet ink flow. 

Designed for convenience, this pen can be posted and disassembled for thorough cleaning. A crucial note: when removing the nib or cleaning the pen, apply silicone grease carefully to the threads and barrel inside to maintain water-tight integrity/smooth operating plunger and prevent ink spills. The exact sleeve presented in the picture with the box of the pen is not available anymore.

Elevate your writing experience with the innovative and resilient Gravitas Ultemate Vac.

Specifications:

- brand: Gravitas
- type: Fountain Pen
- color: Demonstrator
- body material: Acrylic
- cap type: Screw-cap
- filling mechanism: Vacuum 
- nib material: Steel 
- nib size: Extra Fine, Fine, Medium
- postable: Yes
- trim: Silver
- length overall (closed): 150 mm
- length overall (posted): 160 mm
- body length: 142 mm
- cap length: 65 mm
- body diameter: 15 mm
- cap diameter (without clip): 16 mm
- weight (overall): 30 grams
- body weight: 25 grams
- cap weight: 5 grams

Specifications

Brand: Gravitas
Model: Ultemate Vac
Edition:
Color: Demonstrator
Body Material: Acrylic
Finish:

Cap Type:
Screw
Filling Mechanism:
Vacuum Filler
Postable:
Yes
Trim Color: Silver
Length Overall (Closed): 150 mm
Length Overall (Posted): 160 mm
Body Length (Uncapped):
142 mm
Body Diameter: 15 mm
Cap Diameter (Without Clip): 16 mm
Weight Overall: 30 g
Body Weight: 25 g

Customer Reviews

Based on 13 reviews
Write a review
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92.3
100.0
M
Miguel @ USA
⭐️⭐️⭐️⭐️⭐️ Outstanding Pen and Customer Experience!

I recently purchased the GRAVITAS – ULTEMATE VAC ACRYLIC from Pen Venture, and I couldn’t be happier. This is both my first Gravitas pen and my first order from Pen Venture.

Delivery was incredibly fast—I placed my order on August 12 (evening, USA time) and the pen was in my hands by August 18 via DHL. That speed alone was impressive!

I reached out to Emy to ask about setup, and not only did he set up the nib, but he also prepped the pen and included a handwritten note thanking me for my purchase. That kind of personal touch and customer service is rare these days, and it really stood out.

As for the pen itself: I’ve been eyeing this model for a while, and when I saw it on sale, I finally decided to pull the trigger. I’m so glad I did. The ULTEMATE VAC ACRYLIC is everything I hoped for and more. I love vac-fill pens (my Pilot 823 is another favorite), and this Gravitas instantly joined that league. Even without a gold nib, it writes beautifully—smooth, consistent, and very enjoyable. The weight and balance in the hand feel fantastic, making it a true pleasure to write with.

After just one day of use, I can already say this has become one of my favorite pens. And one thing is certain: this will not be my last purchase from Pen Venture.

Thank you for everything, Emy!

— Miguel

T
Tobias
Pure Writing Joy By Gravitas

Sleek, transparent, and impeccably built, the Ultemate Vac Acrylic is as stunning to look at as it is to write with. Its flawless acrylic body showcases the clever vacuum filling system, while the perfectly tuned nib delivers smooth, consistent ink flow with zero fuss. Comfortable and well-balanced this pen turns every page into a pleasure. A true blend of beauty and performance.

P
Peter
Absolutely Superb Customer Service!

I placed my order (my first with Pen Venture) on Saturday 2 August and my Gravitas Ultemate Vac Acrylic arrived at my doorstep the following Friday, from Romania to North Carolina, USA. 6 days!!

I asked Emy if he would check the nib for smoothness and ink flow. This pen is now my smoothest, most delightful writer I have. It out performs most of my gold nibs. I couldn't be more pleased!! Not only did Emy ensure my new pen was perfect, and achieve outstanding order fulfillment, Emy wrote a personal letter of thanks. This guy is one of a kind!

If I'm looking for a special pen in the future I'm going to check Pen Venture first!

All the Best, Peter

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J
Josh Tuck
Deal of the year.

If you haven't pulled the trigger on one of these yet — do so. Mine arrived quickly with a hand written letter (Not a note — a letter) telling me it was tested and tuned, and Emy did not disappoint. For me it has the perfect amount of feedback from the nib. Not too scratchy or too slippery. With a medium nib it's nice and juice on every kind of paper I've tried it on — even Tomoe River which my fine nibbed Sentries have trouble with.

I went back and forth on whether to get this or not. Ultimately, this was one of those purchases that has brought me joy every time I use it.

O
Otis M
My second Gravitas.

Writes like butter! Thanks Emi! Very smooth, low feedback, great flow.

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© 2026 Pen Venture - Passion Virtuous,

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Peter
Excellent Pen! Excellent Service! Excellent Source for Pens!

Emy & Team, I am so pleased with my new Pilot Custom Urushi! I have been shopping around for awhile and thought for the longest time that this pen was out of my reach. Emy, your pricing was so competitive that the pen was now a possibility for me. I bought it and was delighted that it arrived at my door, all the way from Romania in just 6 days. That fulfillment time was quicker than many US-based stores. I appreciated the personal note as well. The pen is a writing dream and I would like to express a sincere "Thank You" to Emy and his Team and encourage anyone looking for a fine writing instrument to look no further than Pen Venture!

Pilot - Custom Urushi Vermillion
★ Reviews

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833 reviews
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V
Gravitas - Monster Aluminium | Teal
Ville
Lovely design, sloppy on the details

I absolutely love this design, but item I received left a lot to be desired in terms of quality and attention to detail. First, the nib suffered from hard starts. Furthermore, in the pen I received, the microengraving on the finial band is so far off centre that the taller letters are clipped at the top (please see attached photo). For me, neither of these is acceptable at this price point. After exchanging a number of e-mails with Gravitas customer support, they agreed to send me replacement parts for the filling mechanism (including the finial band) and the nib unit.

When the parts finally arrived, I was shocked and disappointed to see that the new filling mechanism did not work at all (the two parts at the tip of the plunger are stuck together, even a generous application silicone grease did not get them to move freely). Furthermore, the colour and texture of the anodising on the end finial of the new filling mechanism did not match the original pen, and the finial band has a serial number that was never present in the original pen (see attached photo). I can’t help thinking that someone out there has a “unique limited edition” pen with the exact same serial number on their pen as I do on my spare filing mechanism, which feels wrong. I contacted Gravitas customer support again, and they informed me that the anodising colour cannot be matched perfectly between batches (strange, considering that the anodising on all the parts of the original item I received was well matched), and that the serial number is not a warranty issue, so they will take no further action to try to remedy the situation. After inquiring about the faulty filling mechanism that didn't work even after generous application of silicone grease, I have not received any reply at all from Gravitas, which is disappointing to say the least.

After nearly 2 months, I am now left with a selection of mismatched and dysfunctional parts and disappointment. I find this to be a huge shame since the design itself is so lovely. Some of the issues I raised above are certainly nit-picky, but in my opinion reasonable expectations to have at this price point. Anyway, I hope that my review will at least allow others to have more realistic expectations of the quality of this product.

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A
Aurora - 100th Anniversary Ink - Blue 55ml
ADRIAN MIRCEA HUDAC
Pleasantly impressed !

For a better understanding by on-lookers, I switch into Romanian.
La sugestia inteligenței artificiale, pentru stiloul Parker VP din folosință în momentul discuției, am comandat cerneala Aurora 100th Anniversary Blue, de pe site-ul Pen House. Ei bine, atât de mult îmi place cum scrie această cerneală, fără asemănare cu Parker Blue-Black / Pelikan 4001 Royal Blue, încât am vrut să mai comand încă o călimară ca rezervă ( deși pe moment nu este cazul având în vedere volumul generos al călimării ). Nu mai aveau...căutând pe net alți furnizori de această cerneală de lux rarissimă, am găsit că era în stoc la Dumneavoastră. Așa că, am comandat-o ! Apreciez enorm această cerneală, pentru ambalajul exterior inedit ( inclusiv pungulița ! ), pentru călimara elegantă, cu aspect vintage deopotrivă, pentru eticheta elegantă de siguranțare a dopului, scrisă în italiană și în engleză ( de altfel ca tot ceea ce este scris în exteriorul călimării ! ) pentru dopul intern fixat în gâtul călimării ( ceea ce nu am întâlnit la alte călimări !! ) pentru a preveni scurgerea ccidentală a cernelii. Și în fine, cerneala...are o culoare albastră fără asemănare cu nuanța de la Pelikan 4001 Royal Blue, Parker Washable Blue, Parker Blue-Black. Este o culoare albastră care cere să fie scrisă, care devine plăcută și după uscarea pe hârtie ! Nu își modifică aspectul față de momentul scrierii. Este o cerneală umedă, care încântă și stiloul ! prin calitatea și proprietățile sale. Îmi face o plăcere deosebită / enormă să o folosesc cu stiloul Parker 45 Classic, Made in USA, cu peniță de aur 14 K. Pentru că acest stilou merită ce-i mai bun !

A
Gravitas - Pocket Aluminium Cherry Velvet
Adam Noce
First Gravitas

Absolutely gorgeous little pen. Perfect for quick notes. Nice weight and texture makes it feel lovely in hand. Too short unposted for long writing sessions. And has a pretty smooth nib with little feedback. Everything from buying to delivery was smooth with no issues.

Only problem with the pen was a small ding on the top ridge of the cap. Didn't bother me. It lives in my pocket, will add more dings and scratches because this pen seems built to last a lifetime. This will be the pen my soon to be new born daughter will see me use daily. Will buy Gravitas again in future. PEN VENTURE made it a pleasant purchase experience.

Excuse my poor penmanship/spelling on photos

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P
Gravitas - Entry Raw Stainless Steel
Paul Palmer
Stainless entry

Beautifully made pen; high quality materials. Very simple design which I love. I’m a minimalist at heart. Nib writes flawlessly. Very pleased

C
Gravitas - Steel Nib Unit Black PVD | No. 6
Corey Brown
It's nice to have options

Picked up a fine black pvd nib so that I can swap it on occasion for the medium that's in my Gravitas Pocket Zirconium. This along with everything else in my order shipped quickly and was securely packaged. The nibs are in their own individual plastic cases which is nice to store them when not in use.

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