... -18mm 2)Fireproof,waterproof... 3)Other size also available Calcium Silicate BoardDescription: Calcium silicate wall board is a new type of building ... , etc.Place of Origin: Hebei Province,ChinaMain Raw material: quartz powder, diatomite, mica,cement, calcareousness, lime hydrate, glassfiber,etcMain Dimension: 1220 ...