... *2440, 1250*2000, or as customer's requirement Hollow particle board (chipboard)Sepcifications: 900-1250mm, 1220*2440, 1250*2000, or as ... , use tubular structures to reduce the 60% weight of the board.5).anti-impact Evacuation door core impact up to 20kg ... to improve the work efficiency, reduce labor intensity .Contact person: Penny Wang hollow chipboard ...