... Board,Website:http://www.hzkccn.com, Eco-Friendly Product, Halogen Free, Asbestos Free,Formaldehyde Free ,Mothproof And Damp Proofing.Material Composition: Magnesium Oxide. Magnesium ... ventilation place. It is best to use dust collection equipment and the operator should wear dust mask.Export Packing : In Wooden Pallets ...