This is a A-3730223M1 Blade, Disc Mower, LH PN: 3730223M1Main Description As Following : A-3730223M1 Blade, Disc Mower, LH P.N: 3730223M1 Sold In Multiples Of 25Hole Diameter: .728"/18.5 mmLength: 4.213"/107 mmThickness: .157"/4 mmType: 10 LHWidth: 1.890"/48 mm Stocked As: A-90261559 Found in Section & Models : Hay Tool Parts > Disc Mower Blades, Massey Ferguson MOWER, DISC: 125 Associated Items : New Also This is An Aftermarket Product And : Sold In Multiples Of 25 Hole Diameter: .728" / 18.5 mm Length: 4.213" / 107 mm Thickness: .157" / 4 mm Type: 10 LH Width: 1.890" / 48 mm