Product details:

Forever Stock - Custom Cap Professional Model Heavy Duty. 100-Percent Stainless Steel. Fits over 90-Percent of all chimneys while costing 60-Percent less when compared to ordering a custom made chimney cap. Protects the entire chimney crown and flue from deterioration. Removable hood for easy cleaning. Standard 10 screen height. Superior 3/4 animal proof oval hole mesh that helps prevents creosote build up. Wide 1 1/2 flange for easy installation. For the correct size measure the overall chimney crown size length and width. Than subtract 3 from the length and width to get the correct screen to screen size. Nothing Else Even Comes Close.