Flex-Drain 52003 Flexible/Expandable Landscaping Drain Pipe， Perforated with Filter Sock， 4-Inch by 50-Feet[Product Information]- Pipe unfolds and expands from 4 to 50-feet
- Perforated pipe with a sock is for ground water drainage where soil is fine like sand (French drains， dispersing water from flower beds)
- Exceeds all applicable ASTM Standards
- Compatible with most traditional 3-inch and 4-inch corrugated pipe and 4-Inch PVC
- 30-Percent higher load-bearing rating than standard corrugated pipe
