The Astro Pneumatic 300DL 3 Ton Dual Plunger Low Profile Service Jack has a double pump plunger. Only 8-9 pumps to full height. Lift arm reinforced with internal steel beam for maximum strength. Safety overload protection to relieve excess pressure at maximum rated capacity. 1.9 ton on single stroke under normal load. Extra long handle for easier pumping and reaching under vehicles. Universal 45 Degrees guarantees pumping at any position under load. Heavy duty rear casters. Extra wide front wheel. Meets ANSI Standard for Performance and Safety. SPECIFICATIONS: Min. Saddle Height: 3-9/16" (90mm), Max. Saddle Height: 20-3/16" (515mm), Chassis Length: 31" (789mm), Height with Handle: 56" (1424mm), Frame Height: 6" (153mm), Saddle Diameter: 4-11/16" (120mm), Net Weight: 113lbs. (51kg).