Convert the small-bore hosing (normally 4mm OD) found on portable MIGs for use with industrial size gas regulators and cylinders. Order just the adaptor and hose (AK9) or a complete kit including regulator (REG/KIT/MZ or REG/KIT/MO).Note: AK9 adaptor and hose without regulator is available with 1.5 or 3mtr hose length. Specify length when ordering.