17This brand new Polaris Ski Spindle Bushing Spacer is compatible with 1990 Sprint Star Startrack models. It is a Genuine OEM product that comes with a 30 Day Manufacturer Warranty. The item is 3 inches in length and has specific fitment for Polaris models. Please note that this product is not intended for universal fitment. It is important to be aware that powersports parts contain and/or generate used oil, waste fluids, grease, fumes and particulates, which are all known to the State of California to cause cancer, birth defects, and reproductive harm.