1)The wool felt products are made from Australian raw wool. 2)wool felt has passed the ISO 9001 certification. wool felt in rolls(1) density:0.09-0.44g/cm3(2) Specification:1m x 1m(3) thickness:0.5mm-40mm(4) Character:dustproof,sound-insulated,quakeproof,seal, heat-insulation(5) Use:mainly used for a variety of mechanical equipment,mechanical and electrical products,textile,chemical,electronics, ...