Loc: lake tawakoni
Just the ferrule that goes on hot inside of the compression fitting?
It is going to be either 1/4" or 5/16"
Home Depot does not carry the 1/4" just FYI . Maybe a Ace Hardware. But the box stores, Lowes and Home Depot doesn't have one of the sizes, pretty sure it is the 1/4". I ended up buying at a local hardware store.