MULTIPLE SPECIFICATIONS - This nozzle can help glue in narrow spaces, 4 different nozzle diameters meet different working needs. Nozzle size: 2.0*34mm, 2.0*50mm, 3.0*50mm, 2.0*70mm, Thread diameter: 10.8mm PURE COPPER MATERIAL - Made of quality brass, has been tested hundreds of times for durability, still works like new, copper nozzles could last even more years than aluminum nozzles HIGH COMPATIBILITY - This glue gun nozzle fits most glue guns. You can measure your old nozzle, if the diameter of your old nozzle is 10.8mm, you can buy this nozzle to replace it NO DRIP - All copper nozzles are equipped with a built-in anti-leakage steel ball, no matter in the preheating process, in use or after use, there will be no glue leakage from the nozzle WIDE RANGE OF USES - Jewelry tools, hot melt glue gun tool accessories, can be used for artistic flowers, toys, wood, plastic, glass, metal, stone, brick, ceramic, paper, fabric and other materials, very practical in daily life