1、Upgrade Hot End Kit: Features set screw for a firmer heatbreak to prevent deformation, a brass heat sink for enhanced cooling efficiency, and an upgraded heatbreak fixed shaft for stable printing 2、Efficient Printing: The hardened steel nozzle is wear resisting, with glossy inner wall. The threaded nozzle design allows for easy disassembly and replacement. The heatsink features back magnets, facilitates rapid removal and installation 3、Detachable Nozzle: Crafted from hardened steel, the nozzle boasts improved thermal conductivity, higher strength, enhanced oxidation tolerance, and an extended lifespan. It supports high temperature filaments up to 320℃ 4、Silicone Sleeve: The hot end kit includes an insulated silicone sleeve that prevents the fan from cooling the heating block and aids in maintaining stable temperatures, ensuring better printing results 5、Compatibility: Specifically designed for Lab A1 and for A1 Mini 3D printers, this upgrade hot end kit directly replaces old or damaged hot end components, ensuring consistent printing performance Item Type: Hotend Kit Filament Diameter: 1.75mm Compatible Filament: PLA, ABS, PETG, TPU, PP, PC, Nylon, etc Compatible Model: For Lab A1/A1 Mini Installation Method: Magnetic Installation 1 x Hot End Kit 2 x Wrenches