Roof AC Gasket Kit for RVs: Allows you to install your RV's roof AC unit with confidence. Universal Fit: Fits most RV roof AC units. Seals: Pro?ides a waterproof compression seal that conforms to seams, bumps and irregularities. Kit Includes: (1) self-adhesive picture frame gasket and (2) self-adhesive foam leveling pads for different size AC units. Dimensions: Foam leveling pads measure 7/8-inch x 1-7/16-inches x 18-inches and 5/16-inch x 1-7/16-inches x 18-inches; picture frame gasket has inside dimensions of 14-inches x 14-inches.