18 Different Sizes:
1.2*32mm(0.05"x1.26") 1.5*32mm(0.06"x1.26") 2.0*32mm(0.08"x1.26") 2.0*32mm(0.08"x1.26") 2.0*32mm(0.08"x1.26") 1.0*36mm(0.04"x1.42")
2.0*38mm(0.08"x1.50") 3.0*38mm(0.12"x1.50") 2.0*40mm(0.08"x1.57") 3.0*40mm(0.12"x1.57") 2.0*50mm(0.08"x1.97") 3.0*50mm(0.12"x1.97")
1.5*55mm(0.06"x2.17") 1.8*55mm(0.07"x2.17") 1.5*70mm(0.06"x2.76") 2.0*70mm(0.08"x2.76") 3.0*70mm(0.12"x2.76") 8.5*45mm(0.33"x1.77")

Packing List:
➤18 x Copper Glue Gun Nozzles
➤4 x Rubber Gaskets
➤2 x Silicon Heat Shields
➤1 * Wrench

Installation Method:
➤1. Simply replace the old nozzle with the new one for the glue guns that have never been used before.
➤2. For the glue guns that have been used before, plug in the power and start heating for about one minute, then remove the old nozzle using wrench(DO NOT USE YOUR HANDS IT'S VERY HOT) and replace it with the new one.