Compatible Brand: Fits Ski-doo Compatible Vehicle Category: Snowmobile Shock Type: Gas Position: Rear suspension front arm Eyelets ctr-to-ctr extended: 13 1/4" Eyelets ctr-to-ctr Compressed: 9 1/4" Top Eyelet diameter: 15/16" Bottom Eyelet diameter: 55/64" Number: 503190663Direct OEM Replacement. Maximize all day running comfort through the roughest conditions. Consistent operation even in adverse weather conditions. Sold as unit.