Weldmark by Tweco WMK24 series MIG nozzle is ideal for standard duty welding applications up to 400 amps. Made of copper, with a coarse threaded connection type, and a standard recessed short stop tip. Compatable with MIG guns such as Weldmark 400 Series, WeldSkill® 400, WeldSkill® WM400, Professional Classic® No. 3, or Professional Classic® No. 4. The 0.625 in bore size is perfect for large corners and gaps. Packed in a hanging plastic bag, it is retail ready. Made in United States.