Go Rhino SRM500 Tri Rail Kit for 75" Long x 52" Wide Long Rack Rails only Model 5935072TGo Rhino SRM500 Tri Rail Kit for 75" Long x 52" Wide Long Rack Rails only Model 5935072T The Tri Rail kit is constructed entirely out of 2" aircraft grade aluminum tubing and is designed to work seamlessly with the SRM500 roof rack. Tri Rail kits contain your gear on both the sides and the rear of the rack for a step up in security over the Dual Rail kit. The rear rail also serves as a perfect location to mount scene camp lighting. Designed to work