The hardness is second only to diamond, and it is extremely wear-resistant. Long-term use of carbon fiber or glass fiber reinforced filament. And Very hard-wearing treatment Very low thermal conductivity and Low surface friction coefficient Inside tube is made from Ceramic material to provide excellent thermal isolation between heater and cooling block. And copper for heat dissipation to accelerate heat conduction. And Can reach up to 550°C degree. Compatible with Creality K1, K1 MAX, CR10 SE, Ender 3 V3 KE, Ender3 V3 SE, Ender 3 S1, Ender 3 S1 Pro and Ender 5 S1 3D Printer and other 3D rinters which is equiped with Sprite Extruder Package: 1pc ceramic heatbreak NOTE: We found that many customers do not know how to properly install the nozzle. Remember the core issues in the installation process. Just make sure your nozzle and HEAT BREAK front end are tight and sealed. Otherwise, the melted consumables will leak along the screw holes.