The Stromberg Carlson Universal RV Ladder fits on the rear of any RV â straight or contoured. Rugged construction keeps you safe when going up to do maintenance on the roof or just hanging your chairs on the ladder as you travel to the next camp site. An integrated hinge allows the ladder to mount straight or at an angle. The ladder comes with 4 stand-off brackets and mounting hardware to secure and support the ladder in the shape your RV design demands. Made of 1" dia. anodized aluminum tubing with extruded treads. Stands up to weather so it will look good for years. Ladder is 100" in height. Treads are 10"W between uprights. CAUTION: All screws connecting the ladder to the RV must be fastened to the RVs sub frame or backing. If you are uncertain if your RV has backing installed then contact your RV manufacturer to confirm. It is unsafe to use a ladder that is not connected to the RVs backing or sub frame.• 1" diameter tubing• 92.5" recommended maximum length plus 7" handrails on roof• Mounts on roof 12.75" from edge with 5" stand-off Comes with four 5"" stand-offs & mounting hardware | Stromberg Carlson Universal Exterior RV Ladder