Rotary 14540 Blade, Pack of 3 Replaces: Ariens/Gravely - 04265400 Fits Ariens: Zoom 42, ZT 42, 42" cut, Zoom series, 915159, 915161, 915171, 915323 Fits Gravely: 915148 ZT 42, 915148 ZT 42, 915148 ZT 42, 915150 ZT 50, 915150 ZT 50, 915150 ZT 50, 915170 ZT 42, 915170 ZT 42, 915170 ZT 42, 915328 Zoom 42 18hp B&S, 915328 Zoom 42 18hp B&S, 915328 Zoom 42 18hp B&S Length: 14 7/8"; Width: 2 1/4"; Center Hole Diameter: 5/8"; Thickness: 0.1870"