Weldmark by Tweco WMK24 series MIG nozzle is ideal for standard duty welding applications up to 400 amps. Made of copper, with an adjustable slip-on connection type, and a standard protruding bottleneck tip. Compatable with MIG guns such as Weldmark 400 Series, WeldSkill® 150, WeldSkill® 250, WeldSkill® 400, WeldSkill® WM250, WeldSkill® WM400, Professional Classic® No. 2, 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 Mexico.