This is a A-13800013 Blade, Disc Mower, HD PN: 13800013Main Description As Following : A-13800013 Blade, Disc Mower, HD P.N: 13800013 Dim A (1): 5.19684" / 132mmDim B (2): 1.9685" / 50mmDim C (3): .157" / 4mmDim D (4): .807"x.898" / 20.5x22.8mmType: NO. 6 LH/RH Replaces: T56110300 EDCOR , 1380-0013 FREUDENDAHL(J.F.) Found in Section & Models : Hay Tool Parts > Disc Mower Blades, Freudendahl MOWER, DISC: SEVERAL Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 5.19684" / 132mm Dim B (2): 1.9685" / 50mm Dim C (3): .157" / 4mm Dim D (4): .807"x.898" / 20.5x22.8mm Type: NO. 6 LH/RH