Weldflame 20x20 Carbonized Felt Plumber's Welding Blanket with Kevlar Stitched Edge 4 Grommets Non asbestos velve shield Kevlar stitched edge 4 brass grommets 20"X20" Pliable scratch free soft black carbonized fiber Protects against sparks, spatter, and light slag Continuous operating temperature to 1800 degree F. Intermittent operating temperature to 3000 degree F.