... weight,convient for construction,anti-aging. 2.good drainage Blind Drain --Specificationsgeocomposite drain type:square circular,sheet color:white ... circular,sheetcolor:white,green,blue,blackmaterial:PPPermeability drainage materialGeocomposite blind drain Pipe is made of plastic core and outer ... In the state of hot melting, it is formed into three-D network structure. It has two shapes: rectangle and ...