... bending/compressive strength 4.Xinjiang vermiculite. 1100degree Vermiculite slabs in fireplace characteristics: 1. The fireproofing grade is A grade, under the ... and ceilings 3. Fire brick in stove, electric heater, storage heater ,furnace and fireplace etc.4. Heat insulation boards in planes, trains ... .5%<4.5%<5%<5%PICTURE: 1100degree Vermiculite Slabs In Fireplace