Insulated silicone socket - The silicone socket helps prevent the fan from cooling the heat block and improves temperature stability for more consistent extrusion. Interchangeable nozzles for easy replacement - This improved A1 hot end features hardened steel threaded nozzles that can be removed and replaced, reducing operating costs. Unlike the original A1, it supports special interchangeable nozzles. High temperature capability and durability - The nozzle is made from hardened tempered steel with high thermal conductivity, greater strength, and improved oxidation resistance for longer service life. It supports high temperature filaments up to 320 C, and the removable nozzle allows quick swaps to save time. Compatible model and construction - The nozzle hot end kit uses an enhanced threaded nozzle design that is removable and replaceable separately. Compatible with Bambu Lab A1 or A1 Mini 3D printers. Use scenarios - Print high-temperature materials such as PC or nylon that require stable heat and higher temperatures. - Swap nozzle sizes to optimize for detail (smaller nozzle) or speed (larger nozzle) without replacing the whole hot end. - Maintain prints more efficiently by replacing only the nozzle rather than the entire hot end, reducing downtime and costs.