... ,convient for construction,anti-aging. 2.good drainage Blind Drain --Specificationsgeocomposite drain type:square circular,sheet color:white,green,blue,black material:PP ... Permeability drainage materialgeocomposite draintype:square circular,sheetcolor:white,green,blue,blackmaterial:PPPermeability drainage materialGeocomposite blind drain Pipe is made of plastic ...