Looking to adapt your 2x3 downpipe to mate with a 3x4 gutter downspout? The Aquabarrel Downspout to Downspout Adapter is what you need to use.

The injected molded cap will slide over the 3x4 opening and provide you with a rectangular opening to fit your 2x3 downspout pipe. You MAY need to crimp your 2x3 downpipe a bit to make it fit. Not all downspout pipe is exactly the same size/shape. It's easy to crimp the aluminum downspout with a needle nose pliers.

Available in Brown - White