Contact tip adapter for Miller® M10, M15, M100, and M150 MIG welding guns. as well as Hobart® H9, H10, and H100 MIG welding guns..
These guys have the cheapest prices on parts like this. Everywhere else had the same tips for $17-$20.
Contact Tip Adapter
Works great! Without this tip adapter the MILLER wire welder would be junk!