Order Includes: 2 x Castle Nut, 2 x Pin. Compatible with Polaris models: Sportsman 500 4x4 1996-2000, Sportsman 500 EFI 2006-2009, Sportsman 500 HO 2001-2005. 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.
