1. API certificate 2.Tubing size:15-40 in. OD 3.Pump bore: 125-375 4.Barrel length:8-30ft 5.Plunger length ... : Stationary Heavy Wall Barrel, Bottom Anchor, Cup Seating, Rod Pump 5) RHT: Traveling Heavy Wall Barrel, Bottom Anchor, Rod Pump 6 ... Pump 12) THC: Heavy Wall Barrel, Cup Seating, Tubing Pump API 11AX sucker rod pump