Order Includes: 2 x Castle Nut, 2 x Pin. Compatible with Polaris models: 300 2x4 1994-1995, 300 4x4 1994-1995, Cyclone 250X 1987. Castle Nut Part Number: 7543005 / Pin Part Number: 7661404. Dimensions & Measurements: Inner Diameter: 16.5mm / 0.64", Width: 20.4mm / 0.80", M17 x 1.5. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
