Rubber O-Ring Sound Dampeners for Cherry MX Key Switch, 200-Pieces Type: O-ring for keycap, Material: Rubber Color: white (200-Pieces ) Size: 6mm X 2mm Wear resistance, corrosion resistance, high temperature Fixed seal, oil seals, guide rings, dust seal the hole with seals, Rotary seals, water seals and shaft seals, mechanical seals