Features: The magnetic block on the A1 Mini hot end heating component can quickly and accurately fix the nozzle in the installation position, making the disassembly and installation of the nozzle simple and convenient Before replacement, please ensure that the hot end has cooled down and avoid contact with the heating block at the bottom of the hot end to prevent burns. Comparison of nozzles of different sizes: The 0.4mm nozzle is the standard nozzle diameter for modern 3D printers, effectively balancing printing quality and printing speed. The A1 Mini 3D printer adopts a 0.4mm nozzle size. Quick replacement can provide multiple durable and precise extrusion sizes Kind reminder: Do not use a 0.2mm nozzle to print consumables containing carbon fiber, glass fiber, metal or other inorganic particles, as this may cause blockage. Specifications: Material: Metal Nozzle Size: approx 0.2mm 0.4mm 0.6mm Quantity: 1PC For Bambu Lab A1 Mini Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 1cm errors due to manual measurement. Package includes: 1PC Hot-end Nozzle Kit