Weldmark by Tweco WMK22 series MIG nozzle is ideal for medium duty welding applications up to 250 amps. Made of copper, with an adjustable slip-on connection type, and a standard recessed extension bottleneck tip. Compatable with MIG guns such as Weldmark 150 Series, Weldmark 250 Series, WeldSkill® 150, WeldSkill® 250, WeldSkill® WM250, WeldSkill® Spoolgun, Mini-MIG, Professional Classic® No. 1, or Professional Classic® No. 2. 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.