Buyers Products Air Shift Cylinder Converts A Manually Controlled Pump To Pneumatic Control. It Comes Complete With A Pump Activator Cylinder And Mounting Hardware. The Hydraulic Pump Air Shift Cylinder Works On Commercial?? C101/C102, Buyers Products Bpc1010, Muncie?? E Series, Permco?? Dmd25/Dm640, And Tyrone?? T101/T102.