ITEM NAME:3Pcs Heater Block Silicone Socks, Heater Block Insulation for Creality CR-10,10S Description: Made of non-stick silicone material Helps to keep the temperature extremely stable. Can extend the life of the heater block and extruder by keeping it cleaner. High temperature resistance: 280℃. Professional for 3D printer extruder.for CR-10,10S,S4,S5,Ender 3, Anet A8 Specification: Materil:Silicone Item Size: 22*22*12mm Package Includes: 3 Pieces Silicone Cover.Can extend the life of the heater block and extruder by keeping it cleaner. Made of non-stick silicone material. 3 Pieces Silicone Cover. Item Size: 22 22 12mm. Professional for 3D printer extruder.for CR-10,10S,S4,S5,Ender 3, Anet A8.