The 5 lb roll of 316 Fine stainless steel wool is approximately 1/2" thick and 4" wide and is wound onto a 2" ID core to an outside diameter of about 12" and is approximately 150 long. Stainless steel wool products withstand temperatures in excess of 800°C, exhaust acids and high vibration. Applications: Filtration, Noise dampening, Insulation, muffler packing.