Features: 【High Precision】:High Quality manufacturing and printing quality, not easy to block, avoid uneven extrusion, and provide stable output. 【Easy to Use】:The hotend is pre-assembled for easy installation.Spare parts are always convenient, making replacement easier in emergency situations. 【Extend The Life】: The silicone cover will keep your heater block clean and repel plastic of burnt, which can extend the life of the heater block and extruder Compatibility for Ender 3/Ender 5/CR-10/CR10S ,plug-and-play upgrade alternative . Specification: Material: Aluminum & Stainless Steel & Brass Installation type: external thread connection Throat: stainless steel Nozzle: Brass Size:1.75mm Nozzle size: 0.4mm Aluminum block size: 20 mm x 20 mm x 10 mm Operating temperature range: -40 ~ +260°C