Aston Pipes Inc. stainless chimney cap. The 2100 variety of stainless steel features a high percentage of chromium and nickel, which makes it virtually corrosion-proof. Products made with 2100 stainless steel are therefore your warrantee of long lasting durability and airtightness for the chimney’s masonry. Limited lifetime guarantee Features: Anti-corrosive chrome and nickel protection Stainless steel rivets Heat resistant up to 2,100ºF Individually quality-controlled Installation sheet Impact-resistant Premium-quality 24-gauge stainless steel with 304-2B finish Dimension: 8in x 8in square