Flex-Drain 51510 Flexible/Expandable Landscaping Drain Pipe， Perforated with Filter Sock， 4-Inch by 25-Feet<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Pipe unfolds and expands from 2 to 25-feet</li><li>Perforated pipe with a sock is for ground water drainage where soil is fine like sand (French drains， dispersing water from flower beds)</li><li>Exceeds all applicable ASTM Standards</li><li>Compatible with most traditional 3-inch and 4-inch corrugated pipe and 4-Inch PVC</li><li>30-Percent higher load-bearing rating than standard corrugated pipe</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51l7LagyAEL.jpg" noproxy>