Features: Make of stainless steel, strong and Enduring, anticorrosion, resistant to rain, snow, highly temperature, and not easy to deforms. With mesh screen to protect your chimney flue from interferences from birds, small animals, rain, snow, leave, debris, reducing clogging. The mesh provide smooth ventilation and safe use. The chimney Caps is easy to install and can also be reinforced with screws for added strength. Chimney Caps is smooth and easy to clean, edges is curled, no gloves are required for installation and not easy to scratch your hands. Specifications: Materials: stainless steel Bottom diameter: 7.50cm (2.95inch)/11cm (4.33inch)/16cm (6.30inch)/20cm (7.87inch) Package Includes: 1pc Round Chimney Caps note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.