... material. 4.Hollow 5.Easy for installation Water-proof, fire-proof, anti-crack, anti-earthquake, anti-agingLight weight: ... resistant ability. Shenggang fireproofing magnesium oxide board is produced with the most advancedautomatic producing line and special process, strictly ... 2 Good fireproofing characteristic,nonflammable material A grade, the fire-resistantlimit has reached more than 3 hours;3 Good ...