Original Creality Silicone Heat Block Coveres for MK7 / MK8 and MK9. Fits the Creality CR-10, 10S, Ender-3, Ender-5 and CR20 series printers. Description: Made of non-stick silicone material. Helps to keep the hot-end temperature extremely stable. Extend the life of the heater block and extruder by keeping it cleaner. High-temperature resistance: 280℃. 1 pcs pack.