Amerimax 51710 Solid Flexible Drain 4 Inch By 12 Feet Black

4 inches x 12 feet, black, expandable solid flex-drain, can be used in most drainage applications, soil tight fittings are built into the pipe & the pipe holds its shape after it is bent, therefore no other connectors are needed, simply dig your trench, lay your flex drain pipe & cover it up, meets the corrugated polyethylene pipe association's test for crush resistance.