Weldmark by Tweco WMK25 series MIG nozzle is ideal for heavy duty welding applications up to 500 amps. Made of copper, with a threaded connection type, and a standard recessed tip. Compatable with MIG guns such as Weldmark 500 Series, WeldSkill® WM500, WeldSkill® WM500, or Professional Classic® No. 5. The 0.75 in bore size is perfect for large corners and gaps. Packed in a hanging plastic bag, it is retail ready. Made in United States.