MULTIPLE SPECIFICATIONS: This 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 MATERIAL PURE COPPER: Made of quality brass, tested hundreds of times for durability, still works like new, copper nozzles could last even more years than aluminum nozzles NOT DRIPPING: All copper nozzles have built-in anti-leakage steel ball, no matter preheating process, in use or after use, there will be no glue leakage of the nozzle Wide range of uses: Jewelry tools, glue gun hot melt tool accessories, can be used for artistic flowers, Toys, wood, plastic, glass, ceramic, etc. metal, stone, ceramic, brick, paper, fabric and other materials very practical in everyday life HIGH COMPATIBILITY: This glue gun nozzle is suitable for most udders glue sticks. You can measure your old nozzle, if your old nozzle diameter is 10.8mm, you can buy this nozzle to replace