Feature:Stamp size on the surface, convenient to pick the one you need.The hole of the print nozzle is consistent in size and machining, the thread is clean and well-formed.Extruder brass print heads are usually applied to print non-abrasive material such as PLA, ABS, Nylon, etc.Specification:Material: BrassScrew Thread: M6Nozzle Diameter: 0.3mmInput Diameter: 3.2mmTotal Dimension: 12.5x7mm / 0.5x0.28"(L*W)Package Content: 30pcs x Brass NozzleNOTE:Small accessories, please keep away from children.After replacing the nozzle, please adjust the distance between the nozzle and build plate to ensure the quality of print parts.How to Replace Nozzles?1: Turn on the 3D printer, heat the nozzle, and heat the block to the target temperature (PLA: 180-220, ABS: 240-280).