This is a A-3059 Facing, 6.5" OD, 2" ID PN: 3059Main Description As Following : A-3059 Facing, 6.5" OD, 2" ID P.N: 3059 New Slip Clutch Disc, 6.5" outside diameter, 2" inside diameter. Fits Caldwell Rotary Cutters.Inside Diameter: 2"Outside Diameter: 6-1/2" Stocked As: A-36F41 , Crosses To: A-FF5172 , , A-FF5172J , Found in Section & Models : Hay Tool Parts > Rotary Cutter Parts, Caldwell ROTARY CUTTER: SEVERAL, Hay Tool Parts > Slip Clutch Parts, Caldwell ROTARY CUTTER: SEVERAL Associated Items : New Also This is An Aftermarket Product And : New Slip Clutch Disc, 6.5" outside diameter, 2" inside diameter. Fits Caldwell Rotary Cutters. Inside Diameter: 2" Outside Diameter: 6-1/2"