Fits flue sizes 16" x 16" to 18 1/2" x 18 1/2"

Still heavier and stronger than all other American made chimney caps. Type 304 Stainless Steel - Patented 2-Piece Design - 24 gauge hood - 8" screen height and 3/4" mesh is standard - 22 gauge one-piece base with built-in 3/4" mesh screening - Superior oval hole mesh prevents creosote build up.