Multiple Specifications: This nozzle set helps you apply glue in tight spots. Includes 4 different nozzle diameters to meet your various work requirements. Nozzle sizes: 3.0*32mm, 2.0*50mm, 3.0*50mm, 2.0*70mm. Thread diameter: 10.8mm. Pure Copper Material: Made of high-quality brass, inspected hundreds of times and still performs like new. Copper nozzles last even longer than aluminum ones. High Compatibility: This glue gun nozzle is suitable for most glue guns. Measure your old nozzle; if it's 10.8mm in diameter, this nozzle is a perfect replacement. No Drip: All copper nozzles have a built-in anti-leakage steel ball. No glue will leak from the nozzle, whether during preheating, use, or after use. Wide Range of Applications: Perfect for jewelry making, melting, and as glue gun accessories. Can be used for artificial flowers, toys, wood, plastic, glass, metal, stone, brick, ceramics, paper, fabric, and other materials. Highly practical for everyday use. Includes: 4 hot melt gun nozzles, copper gun nozzle glue, long replacement nozzles, gun tool with extended orifice glue gun nozzle. Large diameter glue 4pcs/lot. Sizes: 3.0*32mm, 2.0*50mm, 2.0*70mm, 3.0*50mm. Package includes 4 glue gun nozzles and 4 waterproof rubber rings. Thread diameter: 10.8mm. Material: High-quality copper and waterproof rubber ring. Caution: Wait 30 minutes for the glue gun to cool completely before changing nozzles. Never touch the nozzle body when using the glue gun. These nozzles have different diameters; a larger diameter means faster glue flow. Choose the right size for your needs.