Yihe magnesium oxid board is Fire-resistance Grade A and thermal insualtion .The boards are made in a laminar process and then autoclaved which is durability and architectural flexibility . Product Specification: Thickness: 3.5 ~ 20 mm Max width: 1220mm Max length: 2440mm Colour: White, light gray, light yellow 100% asbestos free Non-combustible: GB8624 Class A (CNS6532) Water resistant Heat and sound resistant Dimensionally stable Easy to work, fix, veneer Packing: Wooden pallet