The Steele Rubber Products 7/8" Bulb Seal features a rigid "C" channel section that slides onto a track channel or wiper seal with track. Its main function is to seal against the RV when the slide-out is closed, protecting your RV from extreme weather and pests. Commonly found on many Forest River campers, spanning several years, including the Sierra 5th wheel model as well as Evergreen Bayhill 5th wheels. 7/8"H x 1"W x 15'L. Protects RV from extreme weather & pests Commonly found on many Forest River campers Measures 7/8""H x 1""W x 15'L | Steele Rubber Products 7/8" Bulb Seal with Channel, 15' long