Geonworks Poron PCB FoamMade from genuine Poron XRD foam, commonly used in switch films for its ability to be compressed. This product is mean to be seated above the PCB and bellow the switch to lower the pitch of the keyboard's sounds. Material: Poron XRD, Slow Rebound Thickness: 0. 3mm 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.