... in rectangle with many choices of unit weight. The heat insulation materials are usually using "2b" centrifugal glass temperature keeping ... warm keeping material. It has been widely applied for heat insulation of house wall, compartment; temperature keeping of computer rooms, ... 20,25,30,40,50,75,100Sizemm1200*600 R-Value (ASTMC177 & ASTMC518)Heat Resistance Value (On 24)Thickness(mm)48kg/m356kg/m364kg/ ...