The FLEX-Drain-2 in x 3-in x 4-in Polypropylene Downspout Adapter offers polypropylene construction and a flexible design that can bend to fit tight spots and curved spaces. This adapter fits 2-in x 3-in downspouts on 1 end and 3-in and 4-in corrugated pipe and 4-in PVC piping on the other end. FLEX-Drain helps you get the job done faster and easier, with professional grade durability and more versatility than traditional corrugated pipe. Flexible and expandable, FLEX-Drain easily bends around any obstacle, hold its shape during installation and with a simple snap, its integrated soil-tight fittings lock securely and stay connected during backfilling. FLEX-Drain is a complete drainage solution system that's widely compatible with virtually all traditional 3-in and 4-in corrugated pipe and 4-in PVC. Technologically superior, it's made with no-break copolymers and exceeds all applicable ASTM crush standards.