1. Compatible with multiple models: This updated nozzle hot end kit is designed for versatile compatibility, specially made for the A1 and A1 mini 3D printers. The innovative threaded nozzle structure allows for easy removal and safe replacement to ensure smooth performance in various printing projects. 2. Effortless replacement process: Experience an effortless replacement process with this updated nozzle kit that includes removable threaded nozzles for the A1 extrusion head. This design reduces running costs by allowing users to nozzles as needed, improving both convenience and efficiency. 3. material composition: Made of materials, Niplated brass and alloy heater block provide heat protection and abrasion resistance. This combination contributes to a longer lifespan and allows for consistent printing performance without compromising quality. 4. temperature capability: The nozzle with hardened steel features exceptional thermal conductivity and strength, supporting temperatures of up to 320°C. The robust construction enables effective use with temperature filaments, and the removable design saves time during maintenance and upgrades.