Amerimax Amerimax 603722 Flex-Drain Downspout Adaptor, Landscaping Drain Pipe Adapter 3 by 4 by 4-Inch , Black MSRP: Price: 2099-12-31 $20.74 This Amerimax 603722 Flex-Drain Downspout Adaptor is a 3 by 4 by 4-inch adapter that is designed to fit downspouts that are 3 inches in diameter or less. It is made from durable plastic and has a... Add to Cart Add to Cart