Compatible Brand: Fits Ski-doo Compatible Vehicle Category: Snowmobile Shock Type: Gas Position: Rear suspension rear arm Eyelets ctr-to-ctr extended: 16" Eyelets ctr-to-ctr Compressed: 10 5/8" Top Eyelet diameter: 11/16" Bottom Eyelet diameter: 7/8" Number: 503188901Direct OEM Replacement. Maximize all day running comfort through the roughest conditions. Consistent operation even in adverse weather conditions. Sold as unit.