"The TruckStar Dump Tarp Roller Kit helps you protect your load. Works with the Rear Anti-Sail Tarp Retention Bow Kit Item# 331873, sold separately, which telescopes to exactly fit bed width Item# 331873 is required for all new installations or to replace an entire existing system. U.S.A. Fits Length ft. Universal fit, Zinc-Plated Hardware Yes. Extruded aluminum cross bar Item# 331873, sold separately telescopes to exact bed width Cast bearings"