Replaces OEM Part Numbers: Blades: Exmark 1-323515, 1-403026, 1-403059, 1-403086, 1-403148, 1-520843, 103-2507, 103-2527, 103-6336-S, 103-6518, 103-6581, 103-6581-S, 103-6583, 103-6583-S, 103-6738-S, Replaces OEM Part Numbers: Spindle: Exmark 1-414335; Housing OEM 1-634619,1-323532,107-4065,103-8353,103-8280,103-7975,103-2548,103-2547,103-2533; Shaft OEM 1-413330; Pulley OEM 1-413424, Compatible with: Exmark Lazer Z HP LHP4818KC (1998-2000), LHP4819KA (1999), LHP4821KA (2000) with 48-Inch Decks, Blade Length 16 1/8 (16.125) inch; Width 2 1/2 (2.5) Inch; Thickness 0.197 Inch; Center Hole Circle 5/8 (0.63) Inch; Type: Lift Rolled, Pulley included? Yes; Total Spindle Height: 3.83 Inches; Pulley Outer Diameter: 6.30 Inches; Pulley Center Diameter: 4.30 Inches