PM-903
6 1/2'' UBHO SUB STEEL Pin and Box 4 1/2" XH API Thread (used for large muleshoe)
PM-904
6-1/2" UBHO SUB STEEL Pin and Box 4 1/2" IF API Thread (used for large muleshoe)
PM-905
6 1/2" UBHO SUB STEEL Pin and box 4 1/2" XH API Thread ( used for medium muleshoe)