2" Tri Clover Tri Clamp 14WMP Ferrule. Long ferrules are typically welded into a vessel wall or lid like a Hot Liquor Tank, Mash Tun or Boil Kettle. If you're welding it to tubing, then you would ususally use a short ferrule. Ferrule wall is .065" 1/2" OAL. Made from 304 stainless.