TruNorth Enviroboard 5/4 in. x 5-1/2 in. x 16 ft. Stone Grey Grooved Composite Deck BoardsTruNorth Environboard 5 4 in. x 5 1 2 in. x 16 ft. Stone Grey Grooved Composite Deck Boards are used to provide a durable, long lasting, economical deck board. TruNorth Environboard is made out of a rice hull fiber composite with a 95% recycled material composition. TruNorth's rice hull fiber composite is a moisture resistant material that ensures your deck boards will not mold, rot or swell. TruNorth composite deck boards also come encapsulated on