20' x 40' Frame Standard Canopy Replacement Cover(Fits 18 X 40 Frames)This 18' X 40' replacement cover is designed for 18' X 40' frames. Featuring a 14 x 14 mesh count, 12 Mils of thickness and 6 oz. per square yard, this cover is durable enough for both residential and commercial needs. Aluminum grommets are placed every 18" with rope reinforced corners and eyelets for a secure fit. Our covers are weatherproof with 100% UV protection, meaning you will see no signs of fading over time. This replacement cover is also rot- and mildew-proof, making it a great choice for a variety of uses. The tarps are fit to the frame edge with a 3-4" inch gap left for between the frame pole and the cover's edge. Note that the actual tarp size is 20' X 40' as two extra feet are required for the high center angle of the frame. For all of your residential and commercial tarp needs, search through our selection at CanopiesAndTarps.com.