Trailer Jack Polestar Electric 3500lbs Power A-Frame Caravan Levelling Jack This unit has an integrated circuit switch that automatically activates and resets if the amperage is too high. POLESTAR 12V DC 3500 lbs. RV Electric Power A-Frame Tongue Jack for Travel Trailer Camper with Drop Leg and Waterproof Cover. $127.39 The industrial design cover is extremely waterproof. HEAVY DUTY ELECTRIC TRAILER JACK: The POLESTAR 3500 lbs Electric Trailer Jack is designed to support up to 3500 lbs, making it perfect for effortlessly lifting and stabilizing a variety of trailers, including RVs, boats, utility trailers, and off-road vehicles Emergency removable crank included Lippert Components Trailer Stabilizer Jack Stand 298707 Use To Stabilize Motorhome/Travel Trailer or Camper While Parked; Electric; Cross Frame Stabilizer; Bar Style; Steel; With Waterproof Switch Kit Upgraded LEDs glow on your ball and coupler where light is needed most., Specifications: retracted length: 22., 5 cm, extended length: 68 cm, (plus leg dropped by 11 cm), outer diameter of jack tube: 6 cm., 1 year warranty., Improves performance., Easy installation., High reliability.