The Forever Cap CCSS1324 13 x 24-Inch Stainless Steel Double Flue Chimney Cap Designed to fit over an 8 in.x 13 in.and an 13 in.x 13 in. masonry clay flue tiles. Sizes ranging from: 11 in. x 21 in. to 14 in. x 24 in. Hood size is 21" x 31" Made in the USA