Features: brand new and high quality Could be glued to the PCB (it has glue on the back), used to buffer the force between switches and PCB, the typing sound would modified. The modular design makes it for many PCB layouts. Each set contains 16x4-hole, 16x3-hole and 40x1-hole foam. The foam has for 3M glue on the back, preferably to be attached to the Plate with tweezers. Soft Film easy remove and installation. Each package includes 72pcs Specifications: Material:Sponge Foam Function: Could be glued to the PCB (it has glue on the back), used to buffer the force between switches and PCB, the typing sound would be modified. Color: Black Package Size: approx 5x5cm/1.97x1.97in Amount: 16PCS x 4-hole Pads + 16PCS x 3-hole Pads + 40PCS x 1-hole Pads Note: Because of the resolution of the screen, the color may be a little different. There may be some errors in size due to the way of measurement. Package includes: 16PCS x 4-hole Pads 16PCS x 3-hole Pads 40PCS x 1-hole Pads