Usage Tips:The magnetic block on the A1mini hot end heating component can quickly and accurately fix the nozzle to the installation position, making disassembly and installation of the nozzle easy and convenient* Before replacement, please that the hot end has cooled down and avoid touching the heating block at the bottom of the hot end to prevent . The smaller the size, the higher the precision of the model. The 0.2mm nozzle can endow the Da model with smaller layer spaces and a delicate vertical printing surface, making the printing model have high precision. The smaller the size, the higher the model resolution. The 0.2mm nozzle can squeeze out smaller diameter consumables, giving the printing model a high-resolution horizontal printing surface Comparison of different sizes of nozzles: 0.4mm nozzle is the standard nozzle diameter for modern 3D printers, which effectively balances printing quality and printing speed. The Tuozhu A1 series 3D printer adopts a 0.4mm nozzle size. Kind reminder: Do not use the 02mm nozzle to print consumables containing carbon fiber, glass fiber, metal or other inorganic particles, as it may cause blockage. PLA- and PETG- consumables have been tested multiple times and can be printed using a 0.4mm hardened steel nozzle, which is not easily clogged and has good printing quality. It is recommended to use a 0.6mm hardened steel nozzle to print other consumables containing carbon or glass fibers, minimizing the risk of clogging and wear. Colour:black Material:hardened steel Package Contents: 1 x Hotend Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.