Super Max 18 x 20 ft. Premium Canopy Replacement cover is the ready to install canopy top. Designed to exact frame specifications of the 18 x 20 ft. Super Max Canopy the cover attaches quick and easy in less than 15 minutes. Don't settle for cheap tarps or aftermarket covers to replace your canopy cover. Insist on authentic ShelterLogic brand canopy covers. Constructed of the same quality materials and workmanship of our original canopy.