GMMK PRO FlexKit Custom 75% Mechanical Keyboard Kit

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GMMK PRO FlexKit Custom 75% Mechanical Keyboard Kit

4 out of 5 star rating
4
32 Reviews
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Upgrade your GMMK PRO with a new plate and case foam, three premium gasket options, and a redesigned bottom case. Customize to perfection.

  • Shipping truck icon Free Shipping on US Orders over $49.99
  • Shield logo One Year Warranty
  • Black return arrow logo 45 Day Returns
  • Redesigned bottom case for increased PCB/plate flexibility
  • 3 unique gasket materials and 2 custom case foam options for further acoustic tuning
  • G-Foam plate foam absorbs high-frequencies and reflects RGB lighting for brighter illuminationSimple to install
  • Extra gaskets included for stress-free modification
  • Compatible with: GMMK PRO
  • 1× GMMK PRO Bottom Case
  • 5× Case Screws
  • 10× Pre-Installed G-Foam Gaskets
  • 4× Pre-Installed Poron Gaskets

Keyboard Foam

  • 1× G-Foam Bottom Case Foam (1mm Thick)
  • 1× G-Foam Bottom Case Foam (2mm Thick)
  • 1× G-Foam Plate Foam (3.5mm Thick)

3.5mm Thick Gaskets

  • 22× Medium G-Foam Gasket Strips, 20mm Long
  • 22× Medium G-Foam Gasket Strips, 40mm Long
  • 22× Hard EDPM Gasket Strips, 20mm Long
  • 22× Hard EDPM Gasket Strips, 40mm Long
  • 22× Soft Poron Gasket Strips, 20mm Long
  • 22× Soft Poron Gasket Strips, 40mm Long

Find everything to get the most out of your order.

Product Guide

Self-Service Support

a keyboard on a table

Flexible Foundation

The FlexKit’s redesigned bottom case features taller gasket mounts and an expanded interior. These adjustments give the GMMK PRO a bouncier, more flexible typing feel with greater opportunities for acoustic customization.

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Craft Your Perfect Typing Experience

We’ve included a range of easily installable foam gasket options with varying densities. Mix and match to find your perfect configuration!

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Custom Case & Plate Foams

Bottom case foam options come included in two distinct thicknesses for you to try.



Made from our proprietary G-Foam material, these interior sheets absorb high-frequency typing vibrations for clean acoustics. The reflective surface will also boost the appearance of your GMMK PRO’s RGB lighting.

a group of black rectangular objects with screws and nails

Three Gasket Types

PORON, G-Foam, and EPDM gaskets let you customize your GMMK PRO’s typing sound and feel to your preference. Installation is quick and easy with extra strips included for stress-free experimentation.

4 out of 5 stars 32 total reviews
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Jeffrey
Verified Buyer
This is what the GMMK Pro needed from the beginning! It drastically changes the feel and improves it in every way possible. I recommend using the included soft pads for the install.
Published date
22/07/24
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Jimmy J.
Verified Buyer
overpriced, I installed the kit
overpriced, I installed the kit but did not feel much difference from the stock. what a waste.
Comments by Store Owner on Review by Store Owner on Thu Jun 13 2024
Store Owner
Thank you for your feedback. Please note that you can return the flex kit within 45 days of delivery if you are not happy with it.
Published date
13/06/24
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Nolan C.
Verified Buyer
Great sound improvement
Bought this to upgrade my older gmmk I had built 2 years ago. It is had a slightly nicer typing feel, it isn't too squishy like some others if you're worried about that, and they give you plenty of options to customize the feel. The biggest improvement...
Published date
26/12/23
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Ryan
Verified Buyer
GMMK Pro Flexkit review
I have purchased the GMMK Pro flexkit, I think in general the packaging and the instructions and accessories are clear and well packaged. However, the flexkit has not helped with the rigidness of the keyboard, it has gotten to my attention that the polycarbonate...
Comments by Store Owner on Review by Store Owner on Mon Dec 18 2023
Store Owner
Thank you for the review! Please reach out to our customer service team.
Published date
18/12/23
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Cory W.
Verified Buyer
If you are a first
If you are a first time buyer and do not have a GMMK Pro already, do not buy this product in the configuration bundle! When ordering this product in the “configuration bundle”, their website advertises that you will receive the parts you build a complete...
Published date
25/11/23
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