MULTIPLE SPECIFICATIONSThis nozzle can help stick in narrow spaces, 4 different nozzle diameters meet different working needs. Nozzle size: 2.0x34mm, 2.0x50mm, 3.0x50mm, 2.0x70mm, thread diameter: 10.8mm PURE COPPER MATERIALMade of quality brass, tested hundreds of times for durability, still works like new, copper nozzles could last even more years than aluminum nozzles NO DRIPAll copper nozzle are equipped with built-in anti-leakage steel ball, no matter preheating process, in use or after use, there will be no no glue leaking from the nozzle Wide Range of UsesJewelry tools, glue gun hot melt tool accessories, can be used for artistic flowers, Toys, wood, plastic, glass, metal, stone, ceramics, brick, paper, fabric and other very practical everyday materials HIGH COMPATIBILITYThis glue gun nozzle is suitable for most glue guns. You can measure your old nozzle, if your old nozzle diameter is 10.8mm, you can buy this nozzle to replace