Aluminum Alloy Boat TRAILERS torsion Axle ABY480 to ABY680, single and tendem axle linght weight and no rust Aluminum Alloy Boat TRAILERS torsion Axle ABY480 to ABY680, single and tendem axle linght weight and no rustfor boat 4.8m to 7m13" and 14" wheel;jockey wheel;lightscouplier;roller support. Alumnum Alloy Boat Trailers Torsion Axle