Check the listing for details. Stainless Steel Chimney Cap. Condition: New. Listed at 45.73 USD. These caps are designed to fit over a masonry chimney flue tile, no special mounting system is required. This cap comes with 6 total tension screws that will go through spot nuts located along the four sides of the base of the cap. This chimney cap also features a removable lid for easier chimney maintenance. The base of these caps are oversized. For example: If you selected a 9" x 9" extended chimney cap, the base size for this cap would be 9 1/2'' X 9 1/2'' on the outside and approx 9 1/4" x 9-1/4" on the inside. The screen height of these chimney caps are approx 7''. The pictured size shown may not be the size listed, but represents the item listed.See our other listings for our other stainless steel/copper caps No Local Pickups Are Available. We Do Not Offer Any Custom Work On eBay. We CANNOT Change/Modify Orders After Payment Is Made. While We Try To Answer Messages In A Timely Manner, That Is Not Always Possible. A Lack Of Response Isn't A Confirmation That Something Will Fit (Liner/Reducers/Etc.) We Can Only Guarantee Our Own Parts Fit Together And Cannot/Will Not Guarantee That They Will Fit Other Brands (i.e Duravent, Amerivent, etc.).