Description:Material: SiliconeColor: WhiteOuter diameter: 0.8cmInner diameter: 0.5cmHeight: 0.15cmCan be used as Cherry MX keyboard damperCan effectively prevent the oil leakage air leakage, have good sealing effectPackage included:120x O-RingNote:1.Please allow 0.1 cm error due to measurement tools and manual measurements.2.Because of the difference in light and resolution, the color of each product will be different.