Step Rug GRAY Wrap Around 22.5" Wide Trailer Camper Parts Stair Cover New. RV GRAY Wrap Around Step Rug adjusts to fit steps with a tread of 8" to 12". Just wrap around your existing RV step and hook springs into the holes that fit your step. No screws, glue or tools needed. (4) Springs are unique in that the hook ends are turned back making installation easier. Helps to keep your RV clean by cutting down on tracked-in dirt. For manual or electric RV steps.