About the Product： The Creality K1C nozzle heat break is an all-metal integrated design for swift installation and easy replacement, no longer worry about leaking. Note: Only work for K1C/ K1 Max latest version. Supports High-speed Printing up to 600mm/s - With a 30% increase in the overall hot melt section, including a 28.5mm length large hot melt section and 32mm³/s high flow, this kit enables printing speeds of up to 600mm/s. Precision Detail - Tightly fit joints effectively prevent filament leakage during printing. With inner hole roughness Ra≤0.4, ensuring smooth filament feeding. All Metal Design - All-metal design boasts enhanced performance and high temperature resistance up to 300°C which support PLA, ABS, PETG, TPU, PP, PC, PLA-CF, PA-CF, PET-CF multiple filaments printing.