The CIF EPOXY BASE without resin , 8/10TH - 18 microns of copper has 2 sides and 148 x 210mm size.
High qualified stratified 8 layers of glass cloth MIL 13949 F standard Flammability class UL94V0 Moisture absorption <0.05% Arc resistance 60 sec Loss tangent 0.035 Thermal conductivity 0.3 W / mk