New in box-have two and only needed one. Increase payload by 60% (from 22 to 35 cubic feet) by adding these trailer side rails to your Polar 1500 series trailer. Photo is of my wood trailer with a set of these rails, which make a huge difference for capacity. Includes bracket corner connects, two side rails, one front rail, mounting hardware and instructions. Fits 2007 model year or newer trailers. If you see this ad, it is still available.