... no asbestos 3) Moisture-proof CE,ISO, Magnesia oxide board/Mgo board/Fireproof board Materials:Magnesium chloride, magnesia, perlite, alkali endured epoxy glass ... ) High dimensional stability7) Good surface finish8) Easy to work, fix and decorate Size:Thickness: 3mm-20mmMax length: 3000mmMax width: 1220mmOther ... 2.0-2.5 are qualified, for 4mm, our board could reach 4.5 kj/m2. so our boards are ...