Weldmark by CK Worldwide M 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 recessed conical tip. Compatable with MIG guns such as M25, M40, or Hobart H Series. The 0.625 in bore size is perfect for large corners and gaps. It is self insulated and ready for use with a standard shielding gas diffuser. Packed in a pack, it is retail ready. Made in Mexico.