This is a A-21009431 Blade, Disc Mower, RH PN: 21009431Main Description As Following : A-21009431 Blade, Disc Mower, RH P.N: 21009431 Sold In Multiples Of 25Hole Diameter: .640"/16.25 mmLength: 3.740"/95 mmThickness: .139"/3.5 mmType: 9 RHWidth: 1.772"/45 mm Stocked As: A-76N941 , Crosses To: A-76N941 , Found in Section & Models : Hay Tool Parts > Disc Mower Blades, Sitrex MOWER, DISC: SEVERAL (Check Dimensions) Associated Items : New Also This is An Aftermarket Product And : Sold In Multiples Of 25 Hole Diameter: .640" / 16.25 mm Length: 3.740" / 95 mm Thickness: .139" / 3.5 mm Type: 9 RH Width: 1.772" / 45 mm