MKID Spacebar Foam Pad is cut to fit most PCB mount stabilizers in various keycap profiles. For plate mount stabilizers, additional tuning / DIY may be required. It is also useful producing a fuller deeper sound of your spacebar. Includes of 4pcs foam pads with adhesive (non-sticky). You can use the adhesive or not – it depends on your preference. This pads made of LE-20 PORON & EVA material.