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Home Shop Gravitas Brand 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

 
 
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

User picture
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,

Review picture
Isaac Leong
My wonderful first Titan pen

Beautiful colour. The nib is smooth and wet. The grip section is textured, I will not worry about writing with it in hot weather. This is my first demonstrator pen, I love watching the ink level drops (very slowly) in the barrel. The package is packed very securely. Thank you staffs at Pen Venture.

Fifty4T - Titan Slim Line Aluminium Emerald Shadow
★ Reviews

Let customers speak for us

877 reviews
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49
R
Gravitas - Vac 2.0 Aluminium | Black
Richard L Sherman
Gravitas Vac 2

The construction of the Vac 2 is flawless. The textures of the materials and it's simple lines display an elegant beauty. The large steel nib delivers a pleasant writing experience and also provides a bit of flex.

C
Gravitas - Vac 2.0 Aluminium | Black
Chris

Amazing Pen! Gravitas makes one of the best piston fillers out there. I dont keep the nib and normally use the pen for coustom flex nibs with Jowo #6 compatible nib units. So, i really cant speak on the nib. However, this pen is just built with high quality components. The weight, feel, and overall aesthetics are unmatched. You wont find better at this price point.

R
Platinum - #3776 Century Kaga Maki-e Sansui GT
Robert Moore
Platinum Sansui - Smooth Operator

I recently acquired the Platinum Maki-e Sansui pen in a Medium nib. The Pen Venture team was kind enough to carefully inspect and tune this pen before sending it on to me. Many thanks for that. It writes very smoothly and with a steady flow of ink. The Medium nib is my favorite nib configuration from the Platinum brand. The line width is nice and thin and always writes consistently right of the box. This lovely Maki-e pen was no different. I highly recommend it.

D
Gravitas - Steel Nib Unit Silver | No. 6
David Sumrell
Gravitas #6 extra fine nib

The extra fine nib came tuned to perfection—a joy to write with. Thank you Emy!

J
Gravitas - Vac 2.0 Aluminium | Black
Jimmie
FANTASTIC!

The VAC 2.0 is a great improvement to an already great pen (the original VAC Ultem). The weight and balance are spot on. The cap and the new threads engage without hesitation. No missed closures and the cap has a nice stop when threading back on. It posts securely without issue. Filling with the Kraken system is easy. I got a medium nib and it is smoooooooth. Mine is on par with my 823 medium nib The smoothness, wetness and bounce would make you think it's a gold nib. Line width is slightly narrower than the 823 medium. The pen feels solid and well built. I'm not worried about this one getting knocked around. Overall a great pen. Shipping from Pen-Venture to Colorado was five days! Great pen and service all around!

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