By shortening travel and lessening impact, it can minimize finger fatigue.When you use the keyboard cap, it can significantly reduce keyboard sound level.Made of high quality silicone material, the keycap is wear-resistant and durable to use.The outer diameter of the single key cap is 0.8cm, the inner diameter is 0.5cm.It is suitable for mechanical keyboard.Item Name: KeycapMaterial:SiliconeSize Details:Outer Diameter: 0.8cm/0.32" (Approx.)Inner Diameter: 0.5cm/0.2" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:120 X Keycaps