Come with 5 different size nozzles (Small Bore & Long Tube) all in 1 pack, each nozzle has a different and you can use that suits for your requirements. Bore Diameter x Length: 2.0x34mm, 2.0x50mm, 2.0x70mm, 2.0x100mm, 3.0x50mm; Thread Diameter: 7/16 Inch (10.8mm) Made of pure copper material with excellent thermal conductivity and hundreds of durability tests. It can make the glue flow smoothly and steadily, durable and wear-resistant for long-term use! All copper nozzles have a built-in anti-dripping steel ball and waterproof rubber o-ring that prevents the nozzle from leaking glue, whether during preheating, during or after use. Improve work efficiency! This hot glue tips fits more than 90% glue on the market, nozzle thread is 10.8mm (7/16 inch). Long tube nozzle have an average glue amount for hard-to-reach areas. Perfect DIY accessories for precise crafts or small projects such as decorative toys, artistic flowers, home repairs, DIY craft projects and more. Specification Type: Glue Nozzles Thread Diameter: 7/16 Inch (10.8mm) 5 Different Sizes: 2.0 x 34mm, 2.0 x 50mm, 2.0 x 70mm, 2.0 x 100mm, 3.0 x 50mm Material: brass colour: gold Package Contents: 1 set x Glue Nozzles Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.