1Multi Size: This hot air gun nozzle kit adopts 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, 12mm, and square 10x10mm, 12x12mm, and double layer square 10x10mm, 14x14mm. 2Locking Screw: The nozzle of the heat air gun is made of locking screw, which can lock the nozzle firmly and effectively avoid the hot air from the clearance between the nozzle and the steel tube of the heat air gun outlet. 3Suitable Application: This hot air gun nozzle kit is suitable for 850 hot air welding station and can meet your different needs. 4Easy to Clean: Our heat gun nozzles are easy to clean and work well, practical, light weight and excellent workmanship, very portable. 5Aluminum and Stainless Steel: Our heat air gun nozzles are made of aluminum alloy and stainless steel for durability, toughness and rust resistance, and for longer life. Item Type: Hot Air Gun Nozzle Material: Aluminum Alloy, Stainless Steel Basic Parameters: Approx. 3mm or 0.12in, 4mm or 0.16in, 5mm or 0.2in, 6mm or 0.24in, 7mm or 0.28in, 8mm or 0.31in, 10mm or 0.39in, 12mm or 0.47in Square: Approx. 10 x 10mm or 0.39 x 0.39in, 12 x 12mm or 0.47 x 0.47in Double Layer Square: Approx. 10 x 10mm or 0.39 x 0.39in, 14 x 14mm or 0.55 x 0.55in Application: Suitable For 850 Hot Air Welding Station 12 x Hot Air Gun Nozzle