Magnesium oxide board 1. Fireproof, waterproof 2. Size: 1200x2400x5-12mm 3. 100% non asbestos 4.Easy installation Magnesium oxide board:1. fireproof:It reaches the standard of GB8624, CLASS A, British standard 476: part7:1997, and part 4:1970 class one surface spread of flame, and non-combustible class2. waterproof:It can keep its shape and character after soaking in water for a few days.3. ...