FLEX Drain by Amerimax 4-in x 3-in and 4-in 45-Degree Corrugated Downspout Adapter Fittings in the Corrugated Drainage Pipe Fittings department at Lowes.com
Flexible Rain Gutter Downspout Extensions - Gutter Help
Flexible Rain Gutter Downspout Extensions - Gutter Help
KYWYOYOU Rain Gutter Downspout Extensions Flexible, Catch Basin Downspout, Down Spout Extender, No Dig Low Profile Catch Basin Downspout Extension