... construction,anti-aging. 2.good drainage Blind Drain --Specificationsgeocomposite drain type:square circular,sheet color:white,green,blue ... :white,green,blue,blackmaterial:PPPermeability drainage materialGeocomposite blind drain Pipe is made of plastic core and outer filtering ... is very popular in some projects.Application of Geocomposite Drain Pipe:1) Highway and roadway subgrade2) Retaining wall3) ...