1、Threaded Nozzle Structure: The 3D printer extrusion head replacement features an innovative threaded nozzle design that allows for easy removal and replacement. This upgrade includes a high accuracy brass nozzle with a slick, no burr interior, ensuring excellent thermal conductivity and enabling high flow, high accuracy printing, which significantly enhances your 3D printing experience. 2、Quick Installation: The compact, integrated structure of the heat break and heater block enables fast and straightforward disassembly and installation. This design minimizes downtime during maintenance or upgrades, allowing you to get back to your printing projects quickly without hassles. 3、Good Compatibility: This 3D printer extruder hotend is an upgraded version designed specifically for the for A1 and for A1 Mini. Unlike the original hotend, which lacks a replaceable nozzle, the for A1 extrusion head features a threaded, brass nozzle that can be easily detached and replaced, effectively reducing operational costs and increasing the longevity of your 3D printing setup. 4、High Temperature Printing Capability: Made from excellent brass materials, the nozzle facilitate faster printing speeds while supporting high temperature filaments up to 320℃. The detachable nozzles ensure a quick swap, saving you valuable time during projects, while their robust construction provides excellent thermal conductivity and strength, resulting in enhanced print quality and durability. 5、Insulating Silicone Sleeve: The included silicone sleeve serves a double purpose by preventing cooling from the fan on the heater block and contributing to temperature stability during printing. This added insulation helps maintain optimal temperatures, ensuring consistent extrusion and excellent prints across various materials and conditions. Item Type: Hotend Extrusion Head Material: Brass, Silicone Consumable Diameter: Approx. 1.75mm / 0.07in Installation Method: Thread Fixing Compatible Consumables: PLA, ABS, PETG, TPU, PP, PC, Nylon, etc. Compatible Printer Models: for A1, for A1 mini Installation Method: Magnetic Installation 1 x Hot End Kit 2 x Spanners