Hydraulic Hand Pump, 2 Speed, Max PSI 1st stage 200, Max PSI 2nd stage 10, 000, Displacement/Stroke 1st Stage 0.97 Cu-In, Displacement/Stroke 2nd Stage 0.15 Cu-In, Reservoir Capacity 47 Cu-In, Reservoir Capacity 0.20 Gal, Port Size 3/8 In NPT, Max Handle Effort 94 Lbs, Steel Reservoir Material, Steel Pump Material, Steel Handle Material, Length 20 5/8 In, Width 4 3/4 In, Height 4 9/16 In Hydraulic Hand PumpsUse in horizontal or vertical position with head downward. Internal pressure relief valve. 4Z480, 18Y533, 4Z481, 4YDY5, 4YDY6, and 4PU57 are steel construction. 18Y532 is aluminum construction. 6W461, 6W462, and 3KD31 are composite construction with fiberglass handle. 2-stage pumps have high flow at low pressure and low flow at higher pressure. All units are shipped with oil.Hand and Foot Pumps