I managed to acquire a second/spare torch for my mig welder very cheaply. The tips I have fit ok but the shroud/nozzle is different. Can any member tell me what size of nozzle I need to be looking for please? The brass adapter on the torch is 15mm dia x 18mm long, over the spring the dia is 17.5mm. I could take it to a welding supplies shop and get what's needed but thought I would ask here first. Thanks fellas.