Product details:

This stainless steel chimney cap is fully resistance-welded and features a roll-formed 18-ga. one piece base. The extra-wide base contains a concave channel for added strength good looks and versatility. This single-flue cap features a 24-ga. Lid with a one-piece 8in high .75in mesh of 18-ga. Stainless steel. Measures 12in x 16in. Fits 10.5in x 14.5in to 13in x 17in.