Y Duct Connector 12in x 12in x 12in
https://www.dlw.co/shop/404222-y-duct-connector-12in-x-12in-x-12in-12834
https://www.dlw.co/web/image/product.template/12834/image_1920?unique=d9f876c
Made of galvanized steel. Perfect fit. Sealed seams to prevent air leaks.
