ZENY 12V 3500 lb Capacity Electric Power Tongue Jack RV Boat Jet Ski A-Frame Trailer Camper (#02) Powder coat finish resists rusting Up to 3500 lbs. lifting capacity Features easy to operate switch for lifting up to 18", outside tube diameter:2" 3 bolt mounting into standard A-frame trailer coupler, 12 volt operation Removable foot pad, Easy operation hand crank in case your battery goes dead