Features: The magnetic block on the A1 Mini hot end heating component allows for quick and accurate nozzle positioning, making nozzle installation and removal simple and convenient. Before replacement, ensure the hot end has cooled down completely and avoid touching the heating block at the bottom to prevent burns. The 0.4mm nozzle is the standard diameter for modern 3D printers, offering an effective balance between print quality and speed. The A1 Mini 3D printer uses a 0.4mm nozzle. Quick nozzle replacement enables the use of multiple durable and precise extrusion sizes. Note: Do not use a 0.2mm nozzle with filaments containing carbon fiber, glass fiber, metal, or other inorganic particles, as this may cause clogging. Specifications: Material: Metal Nozzle Size: approximately 0.2mm, 0.4mm, 0.6mm Quantity: 1 piece Compatible with Bambu Lab A1 Mini Note: Due to lighting effects and shooting angles, there may be slight variations in product appearance. Manual measurement may result in a 1cm size deviation. Package includes: 1 piece Hot-end Nozzle Kit