Black Downspout Extension. The Amerimax FlexaSpout extension features a rigid, corrugated design for added versatility. With durable vinyl construction, this extension can be buried, bent, or connected to additional sections. Use this downspout extension to divert water away from the foundation or connect it to your drain pipe and catch basin for drainage control. The flexible design bends easily and holds its shape, extending from 25 inches to 55 inches. Features: Vinyl construction for durability. Black color to complement your home and landscaping. Rigid, corrugated design allows you to bury, connect, or bend the extension. Specifications: Height: 4 inches. Length: 25.5 inches. Width: 4 inches. Material: Vinyl.. Weight: 0.92 pounds.