Length:1-4mm,5-8mm color:grey,white Main use: brake block type:A-360,A4-30,A5-70,A5-60 Used: heat resistant ... No.6-40,5-50,5-60,5-70,4-30,4-20,3-60Asbestos content≥ 98%MaterialMineral fiberFiber length0-14 ... )Mohs hardness scale6Maximum Operation Temperature1450Area of OriginHeBei province 2. Feature: 1) Main chemical content is SiO2, MgO, crystal water etc.2 ...