ITEM NAME:M16x1.5 TIG Welding Plasma Connector Gas Electric WP-20P WP-24W M16x1.5 TIG Welding Plasma Cutting Torch Cable Connector Gas Electric WP-25 WP-24W SPECIFICATIONS.M16x1.5 TIG Welding Plasma Cutting Torch Cable Connector Gas Electric WP-25 WP-24W. Compatible With: fit for installation on the WP-20 WP-20F WP-20V WP-20P WP-24W WP-24WF WP-25 water-cooled TIG welding head for connector to TIG welding machine, you need to confirm that your welder interface is a standard M16 thread.