METAL-FAB® Corr/Guard® 4CGSWC Vertical Cap, Stainless Steel, Fits Duct Size: 4 in, 8-1/4 in W x 8 in H Cap

METAL-FAB® Cap, Vertical, Series: CGSWC, Fits Duct Size: 4 in, 8-1/4 in Cap Width, 8 in Cap Height, Stainless Steel, For Use With: Corr/Guard® Single Wall Straight Length Gas Vent System