Oregon 92-030 PK3 Mower Blades - 18" Pack of 3 - Requires 3 blades for 52" cut Replaces OEM part numbers: 103-6402, 103-6402-S, 109-6873 Major brand replacement: Exmark. Fits many Lazer Z series. Fits: Toro 74814, 74818, Titan Z5200 Length: 18"; Width: 2.50"; Thickness: 0.203"; Center hole size:15/16"; Air Lift: 1"