... limestone,quanz sand, ores as main materials, coordinating with some chemical materials, such as soda ash, borax. ... positioning 24kg/m3 2000HZGB/J47-83Max. working temperature 400410GB/T 13350-20003.Main specification of Excellent ... R3.0-R3.5Size:1160*580mm,1160*430mmPacking:with HDPE packing Per bag: 16 pack or 12pack ... 0086-592-3332528Fax:0086-592-3332531 high temperature glass wool blanket