Flex-Drain 4"x8' Black Expandable Perforated Flex Drain expands from 2' to 8', making it suitable for various drainage applications. Its built-in soil-tight fittings and ability to hold its shape after bending eliminate the need for additional connectors. Simply dig your trench, lay the pipe, and cover it up. This durable pipe meets the Corrugated Polyethylene Pipe Associations Test for Crush Resistance, ensuring its longevity and reliability.