Material: Made of eco-friendly engineering Silicone that is super strong, long lasting, and will not break or deform easy. High temperature resistant and will not stick to the surface when heated. Can with stand temperatures up to 280°C and is oderless after heating. These Silicone Covers will keep your Heater Block Clean and Repel plastic or burnt, blackened and build-up, residue. This will extend the life of the heater block and extruder, and helps to keep the hot end temperature stable. Compatible with any 3-D Printer with a E3D V6 PT100 3D printer heater block. Creality Ender 3/3 Pro, Ender 5/5 Pro, CR-10/CR-10S/CR-10 S4/CR-10 S5/CR-10 mini, Ender-2, Anet A8, etc. MK7, MK8, MK9 hotend. Set Contains: 3x Silicone Socks Blue ; 3x Silicone Socks Black Product provided by MMOBIEL - We always try our best to exceed your expectations at every turn. Join the ever growing list of satisfied customers and discover the difference with MMOBIEL.