Features 1. The electrode clamp is made of copper material, ensuring excellent conductivity. 2. With outstanding thermal conductivity, ductility, and corrosion resistance. 3. Compatible with all 9-series air-cooled burners, 20-series water-cooled burners, and 25-series water-cooled burners. 4. Includes four different specifications of ceramic nozzles to meet your various needs. 5. Built to meet standard specifications, strictly following the factory's quality control. Specifications Condition: 100% brand new Product Type: Welding Gun Nozzle Set Material: Ceramic/Copper Color: Purple/Copper Ceramic Nozzle Diameter: 3 pcs: 4# D6.5 x 30 mm/0.26 x 1.18 in 5 pcs: 5# D8.0 x 30 mm/0.31 x 1.18 in 5 pcs: 6# D9.5 x 30 mm/0.37 x 1.18 in 3 pcs: 7# D11.0 x 30 mm/0.43 x 1.18 in Usage: This kit is compatible with all 9-series air-cooled burners and 20-series water-cooled burners, including for Lincoln PTA-9 and PTA-20 PTA-25 burners, Miller Diamondback DB9 and DB 20 DB25 burners, together with Weldcraft WP-9 and WP-20 WP-25 burners. Packing List 16 x Ceramic Nozzle 16 x Electrode Clamp 16 x Clamping Pin 4 x Gun Nozzle 1 x Nozzle Packaging