GMMK PRO FlexKit Custom 75% Mechanical Keyboard Kit

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GMMK PRO FlexKit Custom 75% Mechanical Keyboard Kit

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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

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.

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!

View FlexKit Tutorial

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.

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.

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