The Original FOREVER Chimney Cap For Factory Build Double Wall Chimneys 304 Stainless Steel Lifetime Warranty 2-Piece Design 24 gauge removable hood with built-in 5' or 9" height screening Raise inter collar lets double chimneys ventilate properly 1/2" inch inside lip prevents water from rolling back into the flue Superior animal proof 3/4" oval hole mesh prevents creosote build up Outer base fit over the outside of your chimney, while the 4" long sleeve slips inside the chimney flue Made in the USA Not imported from China or India To find the right size cap for your chimney see the chart below: 6" round: Sleeve is 5-7/8" Outer ring is 13-1/4" 7" round: Sleeve is 6-7/8" Outer ring is 13-1/4" 8" round: Sleeve is 7-7/8" Outer ring is 13-1/4" 9" round: Sleeve is 8-7/8" Outer ring is 17-1/4" 10" round: Sleeve is 9-7/8" Outer ring is 17-1/4" 12" round: Sleeve is 11-7/8" Outer ring is 17-1/4" Copyright 2021 Powered by Turbo Lister The free listing tool. List your items fast and easy and manage your active items.