This is a A-55906000 Blade, Disc Mower PN: 55906000Main Description As Following : A-55906000 Blade, Disc Mower P.N: 55906000 (Sold in Multiples of 25)Hole Diameter: .716" / 18.2mmLength: 4.566" / 116mmThickness: .160" / 4mmType: 9 LHWidth: 1.772" / 45mm Stocked As: A-76N943 Found in Section & Models : Hay Tool Parts > Disc Mower Blades, Kuhn MOWER, DISC: DISC MOWER - CHECK DIM. Associated Items : New Also This is An Aftermarket Product And : (Sold in Multiples of 25) Hole Diameter: .716" / 18.2mm Length: 4.566" / 116mm Thickness: .160" / 4mm Type: 9 LH Width: 1.772" / 45mm