Feature: 1. [Hardened Steel Nozzle] The ceramic heating block kit features 0.4mm hardened steel nozzle which ensures both high flow printing and hardness with high temperature resistance up to 320℃. 2. [Smoothly Interior Surface] The hotend heating block kit has a ≤Ra0.4 interior roughness of the nozzle, ensuring smoother filament feeding and delivering outstanding print results. 3. [Excellent Heat Conduction] This ceramic heating block kit features 360° surround ceramic heater for improved heating efficiency, more uniform heating distribution, and faster heat transfer. 4. [High Speed Printing] The hotend heating block is designed with enlarged melt cavity length reaching 285mm, supporting high speed printing up to 600mm per second, making your printing projects quicker and more efficient. 5. [Wide Compatibility] Compatible with most printing filaments such as PLA, ABS, PETG, TPU, PA, PC, PLA CF, PA CF, and PET CF, the heating block kit works with for K1, for K1 maximum 3D printers. Specification: Item Type: Ceramic Heating Block Hotend Kit Material: Ceramic, brass, titanium alloy Throat Material: Titanium alloy Nozzle: 0.4mm hardened steel nozzle Thermal Insulation Performance: Supports high temperature printing (≤320℃), titanium alloy can reduce the upward heat transfer of heating block Compatible Filaments: PLA, ABS, PETG, TPU, PP, PC, Nylon, etc. Support Filament Diameter: 1.75+0.05mm Ceramic Heating Power: 60W Compatible Models: for K1, for K1 Maximum Flow Rate: 32mm³/s Printing Speed: 600mm/s. Package List: 1 x Nozzle 1 x Throat 1 x Silicone Sleeve 1 x Ceramic Heating Element 1 x Thermistor 1 x Round Ceramic Mounting Block 1 x Aluminum Block Nut 1 x M3 Top Tightening Screw