The Olympia Stainless Multi-Flue Chimney Cap is 19" X 19" screen to screen size 8" screen height. Put together by a hinge pin 24 gauge lid & 18 gauge mesh 304 stainless steel 3/4" mesh Wing nuts Easily adjusting reversible hinged mounting flanges Stainless steel Tapcons & masonry bit included 2.5" lid overhang Removable lid This is a knock down cap and is easily assembled. 10", 12", 14"and 16" screen heights are available for additional cost. Please contact us if you need a taller screen height.