EPT Plate Foam

Material: EPT (Japan)
Thickness: 4mm

This material is used in automotive and has performed in Soundproofing, Anti-vibration, Waterproof, and Flame retardant.
It has good elasticity, flexibility, and compressibility

Dimensions
Fits 80% TKL F12
There is also a chance of machine-cutting differences that will affect the measurements of the foam. 

※ If there is any interference, such as the Layout, PCB type, or kind of reset switch to be used, You can easily cut and use it using a knife/scissors.