Product Name: Carbon Steel End Cap, with Bird Screen & Accessories Set
Type: Quick-Fit End Cap
Material: Carbon Steel
Pipe Size: to Fit 12 Inch (OD 323.8 mm) Pipe
Wall Thickness: 10.31 mm
Surface Treatment: Galvanized

Source: https://www.landee.cn/carbon-steel-end-cap-od-323-8-mm-wt-10-31-mm-galvanized.html