Specifications Item Model Number: EJ3500B Loading Capacity: 3500 lbs/1588 kg Voltage: DC12V Maximum Power: 350W Stroke: 460 mm/18.11" Lifting Range: 250-710 mm/9.84"-27.95" Hole Pitch: 1.97"/50 mm Lifting Range: 250-860 mm/9.84"-33.85" Product Weight: 9.8 kg/21.61 lbs Package Content 1 x Trailer Jack 1 x Crank Handle 3 x Galvanized Thick Gasket 3 x Galvanized Stop Washer 1 x Waterproof Sunshade Cover 1 x Manual