Heavy duty boat trailer rollers, a pair of ten boat trailer rollers, set on a heavy duty 80mm x 40mm boat trailer roller carriage. Fully galvanized construction. The upright fixing poles for these boat trailer rollers are manufactured from 40mm square box section. The fixing plates are universal and will fit all boat trailers. The boat trailer rollers themselves are polyurethane non marking rollers with very hardwearing nylon inserts. A quality set of boat trailer rollers.