... size:15-40 in. OD 3.Pump bore: 125-375 4.Barrel length:8-30ft 5.Plunger length:2-7ft 1.About ... seat materials: stainless steel and tungsten carbide 4. Pump designation: 1) RHAM: Stationary Heavy Wall Barrel, Top Anchor, Mechanic Seating, Rod Pump ... 3) RHAC: Stationary Heavy Wall Barrel, Top Anchor, Cup Seating, Rod Pump 4) RHBC: Stationary Heavy Wall Barrel, Bottom Anchor, Cup Seating, Rod ...