This chimney keeper cap offers protection for your chimney so debris and animals can't get in. Comes with a 5/8-inch mesh screen for extra defense. The Guardian cap does double duty. First, it gives you a chimney cap with a screen, making it an excellent choice for relining jobs. Secondly, it is a great replacement cap for solid package, factory built chimneys. All Guardian caps have a high collar and come pre-assembled. These universal components fit all leading brands of flexible liners. FEATURES: Fuel Type: Wood/PFor Forever Flex, Ultra Pro, Pro, Hybrid, Smooth-N-Lite and Round Flex liners. 304L alloy stainless steel. 5/8 inch mesh cover included. It can prevent drafts from entering your home through your chimney. Strong and durable construction to ensure it withstands the elements for a long time. Friction fit. Use with solid package factory liners and chimneys. It can be used with a collar plate or used with a storm collar, T-clamp and T-plate to complete the system. Mesh: 5/8". Diameter: 9".