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".