The Forever Cap Slip-In 8 in. Round Fixed Stainless Steel Chimney Cap FSIRC8 - The Home Depot
Amazon.com: Bootuu 6 Inch Round Chimney Cap, 8 Inch Tapered Top Chimney Cap with Screen, 6 Inch Chimney Cap with Fastening Device with Screen, Stovepipe Finial, Carbon Steel (6 in) : Home & Kitchen
Amazon.com: Rain Cap Spark Arrestor (8") : Automotive
Amazon.com: VIVOHOME 8" Cone Top Chimney Cap with Screen, Round Roof Rain Chimney Cover, Galvanized Steel Fireplace Exhaust Cap, Adjustable Roof Cap for Vent : Home & Kitchen
Stack Topper, 8" diameter - Smoky Lake Maple Products, LLC
AllFuel HST Tee With Clean Out Cap for 8" Diameter 304 Stainless Steel All Fuel Class-A Double Wall Insulated Chimney Pipe - Amazon.com