LulzBot TAZ Single Extruder Tool Head V2c, 0.5 Nozzle Like all LulzBot tool heads, this uses an open (non-proprietary) filament format, which means you can stay on the cutting edge of the 3D printing industry and adopt new materials as they become available This assembled tool head is sized for 3mm filament and includes a print cooling fan for clean and crisp 3D prints The LulzBot Hexagon Hot End is designed for 24v TAZ (3-5) 3D printers, has a 0.35mm nozzle diameter, and comes equipped with a dedicated hot end cooling fan This versatile tool head is available as a replacement or backup for the LulzBot TAZ 5, or as an upgrade for owners of the TAZ 4 It also includes two fans, one for the heat sink and one for the nozzle to help achieve fine detail with certain materials