1. API certificate 2.Tubing size:15-40 in. OD 3.Pump bore: 125-375 4 ... materials: stainless steel and tungsten carbide 4. Pump designation: 1) RHAM: Stationary Heavy Wall Barrel ... , Top Anchor, Mechanic Seating, Rod Pump 2) RHBM: Stationary Heavy Wall Barrel, Bottom Anchor ... Pump 11) THM: Heavy Wall Barrel, Mechanic Seating, Tubing Pump 12) THC: Heavy Wall Barrel, Cup Seating, Tubing Pump API ...