POLARIS Trail Blazer 250 ATV Front And Rear Wheel Bearings Model 1990-1999 Set of 4 Bearings Quality Ball Bearings for POLARIS Trail Blazer 250 ATV( Front And Rear Bearings), Set Contains 4 Bearings, each bearing has rubber seals to protect the bearings from dust or any possible contamination, also bearings are pre-lubricated with grease.