Features: LONG SERVICE TIME- Made of pure copper material, have been tested for hundreds of times in durability, still work like new, copper nozzles could last even more years than aluminium nozzles. LEAKPROOF DESIGN- All copper nozzles have a built-in leakproof steel ball, no matter in pre-heating process, in use or after use, there will be no glue leakage from the nozzle. HIGH COMPATIBILITY- Suitable for 98% above glue gu-ns on the market, We suggest using high power glue gu-n for the long nozzle to achieve the perfect using effect. Installation Method: 1. Simply replace the old nozzle with the new one for the glue gu-ns that have never been used before. 2. For the glue gu-ns that have been used before, plug in the power and start preheating for a few minutes, then remove the old nozzle using spanner(DO NOT USE YOUR HANDS IT'S VERY HOT) and replace it with the new one. Specification: Color: Copper Material: Copper Size: 2.0x70mm,3.0x70mm,1.5x70mm Quantity: 1Pc Note: And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 x Nozzle