ITEM NAME:10Pcs/Set Long Back Caps 41V24 for TIG Welding Torch WP-9 WP-18 WP-26 Description: Fit for WP-17 18 26 TIG Welding Torch Kits TIG Welding Back Cap Long Material: Plastic Length: Approx. 12cm /0.39inch. Thread Diameter: 9mm/0.03inch. Specification: Color: Black Package Includes: 10 Piecex TIG Back Cap SKU: DMO0012652473016772.Fit for WP-17 18 26 TIG Welding Torch Kits. TIG Welding Back Cap Long. 10 Piecex TIG Back Cap. Color: Black.