1)Material:100% raw wool 2) 20 meters per roll The sheep wool felt is used as Oil-Filter, Seals, Pads and Gaskets in mechanical machine;,Chemical industries,Electronics, Home Appliance,Textiles,Vehicles,Shipbuilding,Army products,Energy Sources, Electrical Wires, Minerals, Construction Industry and non-ferrous metal industry. Also have the function for Oil-filter, Anti-Static, Insulation Pad, ...