Kotap 21-ft x 20-ft Fire-Retardant White Tarp, Item: FR-2120 FINISHED SIZE: 21-Feet by 20-Feet Treated and certified tested for both FR NFPA 701 Method 1 and CPAI 84 Section 6 Guidelines 10 by 10 Weave per square-Inch Rust-proof aluminum grommets every 2 ft. on edge, nip and on each corner All four edges heat-sealed and reinforced with PE rope in hem