The Weldmark by CK 57N75 alumina nozzle is designed for use with a large gas lens setup on TIG torch models 17, 18, and 26. It features a 3/8-inch opening and is supplied in a pack of 10 for replacement stock in the shop or on the job. The nozzle directs shielding gas around the tungsten and weld area during TIG welding. Check your torch’s gas lens configuration and required nozzle size before ordering. Product details: Brand: Weldmark by CK Part number: 57N75 Material: Alumina Nozzle opening: 3/8 inch Application: Large gas lens setup Torch models: 17, 18, and 26 Package quantity: 10 nozzles Package includes: Ten alumina nozzles. Torch, gas lens, and other accessories are sold separately.