Suggested Retail:$10. Flex-Drain 51910 Flexible/Expandable Landscaping Drain Pipe, Perforated, 4-Inch by 12-Feet. Pipe unfolds and expands from 15-inches to 12-feet. Perforated pipe is for ground water drainage (French drains, dispersing water from flower beds) where soil is coarse. 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.. 4" x 21" x 8". 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.