Xirbbo A1/A1 mini nozzle hot end kit with an improved thread nozzle structure. The nozzle is removable and replaceable separately, compatible with A1 or A1 mini 3D printers. Easy replacement and cost efficiency - An improved version over the original A1 hot end, which had no interchangeable nozzles. - The Xirbbo A1 extrusion head uses hardened steel threaded nozzles that can be removed and replaced to reduce operating costs. - Supports special interchangeable nozzles for quick swaps. Durable materials for long service life - Heating block made of nickel-plated brass and Ti alloy with strong heat resistance, abrasion resistance, and erosion resistance. High temperature printing capability - Tempered steel nozzle with hardened steel construction offering high thermal conductivity, strong mechanical strength, and good oxidation resistance. - Long service life suitable for high temperature filaments up to 320 C. - Removable nozzle design enables easy replacement and time savings. Use scenarios - Upgrading A1 or A1 mini printers to enable interchangeable nozzles and reduce downtime and maintenance costs. - Swapping nozzles to optimize for different materials or print qualities, including high temperature filaments up to 320 C. - Keeping as a ready spare replacement kit for schools, workshops, or production environments to ensure quick maintenance and consistent performance.