RapidRise hydraulic power unit includes dual pump pistons that raise the lift arm to maximum height in six full incremental pump strokes. Strong chassis with upper and lower frame flanges to withstand twisting. Wide front wheels and ball bearing mounted rear caster wheels for stability and easy maneuverability. Angular positioned pump pistons provide maximum effective pump stroke when jack is completely under vehicle. Pump piston dust shields and wiper seals prevent contaminants from entering the hydraulic systems A heavy duty service jack designed for continuous, dependable performance in any automotive service and repair shop. Overload and bypass safety valves prevent the jack from being used beyond its rated capacity and over extension of the ram. Rubber saddle pad protects vehicle frame from scratches while also providing a sure grip lifting surface. Grooved saddle pad surface accepts vehicle panel rail. Pump handle protector pad prevents damage to under car components and any vehicle parked close to the jack. Low Height: 3.875" High Height: 20.5" Chassis Length: 28" Chassis Width: 14.25" Chassis Height: 6.375" Handle Length: 50" Saddle Diameter: 4.75" Shipping Weight: 115 lbs.