Features 1、Good Material: Using high quality ceramic material, has great durability against high temperature and long use. 2、Practical Use: With 23.5mm 12# porcelain mouth diameter and 27.5mm 14# porcelain mouth diameter, suits for WP‑9/17/18/20/25/26 series welding gun. 3、2Pcs in 1 Set: Including 2pcs TIG welding cup in total, providing you with a prefect solution for replacement. 4、Plastic Boxes: Easy welding nozzle has its own plastic box, which largely simplifies the carrying and storage. 5、Easy to Install: Designed to have a compact size and a light weight, the installation is very easy to complete. Specification Item Type: TIG Welding Cup Material: Ceramic Applicable Welding Gun: For WP-9/17/18/20/25/26 series. Model: 12#/14# 12# Porcelain Mouth Diameter: Approx. 23.5mm / 0.93in 14# Porcelain Mouth Diameter: Approx. 27.5mm / 1.08in Function: Replacement parts for welding porcelain nozzles. Package List 2 x TIG Welding Cup 1 x Plastic Box