Neiko 10908A Heavy Duty Fiberglass Welding Blanket and Cover with Brass Grommets, 4' x 6', Clear 100% FLAME RETARDENT: durable and general purpose welding blanket to prevent property damages from sparks and spatter HEAVY DUTY: 19.8 oz./ sq.yd. fiberglass to provide excellent thermal protection PREMIUM WEAVING PATTERN: 30 x 30 per square inch for added durability and stands up to long term repeated use WORKING TEMPERATURE: up to 1000F (537C) REINFORCED HEM: 3/8 I.D. brass grommets every 11 for secure and easy hanging