... setting and cleaning (4)OEM nonmetallic building materialsspecifications :1.material:pvc ,Calcium Carbonate ... not easy to deformation,resis erosion, mothproof , sound insulation , waterproof , fireproof , aging-resisting ,.durable ;3 ... insulation , Moisture-Proof , Mound-Proof , Smoke-Proof , Sound-Absorbing , Soundproof , WaterproofNOTE:all kinds of demand can be customed nonmetallic building materials ...