1. Updated Nozzle Structure : This hot end nozzle features an enhanced threaded design, allowing for easy extraction and replacement. It is fully compatible with A1 and A1 Mini printers. 2. High-Temperature Printing : The kit includes a hardened steel nozzle that can withstand filament temperatures up to 320 °C. Its superior thermal conductivity and oxidation resistance ensure consistent and reliable performance over time. 3. Premium Materials : Constructed from titanium-plated brass with nickel (Ni) coating, the heating block offers excellent heat resistance, wear resistance, and longevity. The hardened steel nozzle enhances thermal conductivity and durability. 4. Easy Replacement : Unlike the original A1 extrusion head, this kit allows for quick nozzle replacements, helping to lower operational costs. The insulated silicone outlet stabilizes temperature for optimal printing results. Use Scenarios : - Ideal for advanced users looking to print with high-temperature materials like Nylon or Polycarbonate. - Perfect for hobbyists who frequently replace nozzles to experiment with different filaments. - Suitable for small businesses requiring consistent print quality and lower maintenance costs in production.