MULTIPLE SPECIFICATIONS: This nozzle is designed to reach narrow spaces, with 4 different nozzle diameters to meet various application needs. Nozzle sizes: 2.0*34mm, 2.0*50mm, 3.0*50mm, 2.0*70mm. Thread diameter: 10.8mm. MATERIAL – PURE COPPER: Constructed from high-quality brass, tested extensively for durability and long-lasting performance. Copper nozzles offer extended service life compared to aluminum alternatives. LEAK-PROOF DESIGN: Features a built-in anti-leakage steel ball valve to prevent glue leakage during preheating, operation, and after use, ensuring a clean and controlled application. VERSATILE APPLICATION: Suitable for use with glue guns as an accessory for various crafts and repairs. Ideal for materials such as wood, plastic, glass, ceramic, metal, stone, brick, paper, and fabric. Practical for everyday household and artistic projects. HIGH COMPATIBILITY: Designed to fit most standard glue guns that accept 10.8mm diameter nozzles. If your existing nozzle measures 10.8mm in diameter, this product is a compatible replacement option.