Feature: 1. High Quality Material: Trailer jack is made of high quality galvanized steel and rubber material, high strength, rustproof, sturdy and durable. 2. Adjustable Height: Total height after shrinkage is approx. 580mm/22.83in, total height after stretching is approx. 834mm/32.83in, can lift approx. 254mm/10in. 3. Excellent Performacne: Professional manufacturing, exquisite workmanship, rated bearing capacity is 1200lbs, heavy duty trailer jack has a long service time. 4. Easy Operation: Swivel handle and long crankshaft provide comfortable hand cranking action to quickly raise and lower, convenient for using. 5. Wide Application: Adjustable trailer tongue jack is suitable for yachts, trailers and RVs, etc, and has a wide range of application. Specification: Item Type: Trailer Jack Material: Heavy duty steel (process galvanized) and rubber (wheel)Bearing: 1200 LBS or 540 kg (please do not use overweight)Lifting Size: Approx. 254mm/10inWheel: Approx. 150mm/6inTotal Height After Shrinkage: Approx. 580mm/22.83inTotal Height After Stretching: Approx. 834mm/32.83inCenter of Fixed Plate from Ground After Shrinkage: Approx. 320mm/12.60inCenter of Fixed Plate from Ground After Stretching: Approx. 574mm/22.60in Fitment: Fit for yachts, trailers and RVs. Package List: 1 x Trailer Jack with Wheel2 x Mounting Bracket4 x Bolt