Product Description Cuttable and versatile, this poron foam can be used between the top and bottom case to eliminate any ping or resonance and to deepen overall sound. Check the dimensions of your gasket slots on the keyboard you have purchased (if it has them) or just buy a pack of either 2mm or 3mm and cut to size and place around the board rim where the cases meet to eliminate resonance between the two pieces of metal. Reflecting on it, I am not sure why I opted to stock different lengths, so this will probably change in future. The thickness variants should make a small difference though. Specifications Material: LE‑20 PORON® urethane foam Manufacturer: Kelowna Installation: To be installed between the top and bottom case around the edges of the keyboard to create a small gap. Thicker foam increases the gap.
