Features: Stainless Steel Throat: 3D printer parts aluminum heater block extruder hotend kit is replacement parts for Ender 3 /Ender 3 Pro / Ender 5 /Ender 5 Pro /CR10 /CR10S /S4 /S5(There is no threaded hole between the heating block and the heat sink to fix it). 0.4mm Brass Nozzles: The extruder nozzles can prevent print head from leakage effectively and produce consistent prints with smooth and glossy polish. Reduce the resistance from the corners and avoid blocking of the filament with rounded chamfer. Specifications: Colour: as shown Material: plastic+metal Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 x 3D Printer Parts Accessories Tool Set