87-03 YFM350X Warrior Swing Arm Bearing Kit YAMAHA ATV Set of 2 Bearings Set of 2 Needle Roller Bearings, this is a popular size that used in 87-03 YFM350X Warrior Swing Arm Bearing Kit YAMAHA ATV, each bearing has 2 Rubber Seals to protect the bearing from dust or any possible contamination.