Lumber Tarp - 20' x 28' (6' Drop & Flap) - 14 oz./18 oz. Combo Blue Tarp20 28 Midweight Combo Lumber Tarp 6 Drop & Flap 18 oz 14 oz PVC Blue This 20 28 blue combo lumber tarp blends heavy duty durability with lighter handling. Featuring an 18 oz PVC coated polyester top and 14 oz sides, it reduces overall weight while still providing reliable coverage for tall and stacked loads. With a 6 drop and a 12 rain flap, it's designed for use on 53 trailers when paired with a second tarp. Hybrid Build for Easier Use Without