Attributes . 24 oz. Black Carbonized Fiber, Lightweight, Soft, and Flexible Welding Blanket, Providing Incredible Ease of Use While Withstanding High Heat, Protects Against Sparks, Spatter, and Light Slag, Temperature Rating: 1800 Degrees F, Weight: 24 oz./yd2, Not Grommeted, Not Recommended for Stress Relief, FM Approved . Names