Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! zirconium copper nickel plating treatment, high temperature resistance 500C degree printing, fast heat conduction. The throat is equipped with a chromium zirconium copper radiator, surrounded by red aluminum fins for better heat dissipation. [Fix with screws to avoid breakage]Heating Block And Radiator Connected By Three Titanium Alloy Screws Fixed To Avoid High-Speed Printing Pipe Bending And Breaking Phenomenon, Throat And Heating Block For The Integration Of Interference Fit, Throat Structure Upgraded, And The Heating Block With The Increase Of Limit, To Solve The Phenomenon Of Material Leakage And Fall Off; The Roughness Of The Inner Wall Of The Throat And Nozzle Is Ra0.4, Which Reduces The Plugging Phenomenon. [Screw connection design]Nozzle Structure Upgraded, Using Threaded Connection Heating Block And Throat To Solve The Phenomenon Of Falling Off, The Nozzle Is Quenched With Quenched Steel Skd11, More Than 55 Degrees, More Wear-Resistant, Prolonging Service Life. The hardened steel 0.4mm nozzle is removable, you can remove the nozzle the nozzle with just a wrench no need to grab the heat sink, it is a great choice if you often change the nozzle. Please heat up the bambu labs hotend to about 260 when changing the nozzle, it helps you to prevent it from leaking, please of your hand; [Compatible models]All Metal Design , Print flow up to 35mm/S, Overall max temperature is up to 320C degree.Compatible with for X1/X1C 3D printer. [packing list]One set hotend installed with 24V 60W ceramic heater and thermistor,1pc silicone cover as spare part, 1pc 0.6mm nozzles and 1 pc 0.4mm nozzle Color: Red Material: Aluminum alloy Package Contents: 1*Ceramic Heater HotEnd Kit with Nozzle 0.4/0.6mm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.