5 piece, storm drain contractor pack, includes 3 pieces of 39.5" channel with grate, 1 end cap & 1 end outlet, for surface water drainage system, easy to install, grates clip in, bottom outlet accommodates 3" & 4" sewer & drain pipe, lightweight, uv inhibited, rated for 5 tons, heavy duty, can be used to drain driveways between garage & driveway, patios to prevent water pooling, swimming pools to divert pool water away from grass or flower beds, gardens, sport courts & walkways.