Welding Blanket Heat Treated Fiberglass Size:4’x 6’ thickness:0.6MM working temperature:550C brass grommets on each side ¿This welding blanket made from heavyweight, flame-retardant fiberglass providing protection to equipment and work areas from damage from sparks and spatter. ¿Size: 4FT x 6FT ¿Thickness: 0.6mm ¿Working temperature: 550¿ ¿Brass grommets on each side ¿Welding blanket is a must have piece of safety equipment if you are doing any type of welding.