Boss Bearing P-ATV-FR-1002-4D5-4 Front Wheel Bearings and Seals Kit Trail Boss 330 2005-2009 Kit Contains: 4 Bearings and 4 Seals All Bearings feature low-drag double lip rubber seals on both sides. Double sealed bearings outperform metal shielded bearings because they keep out dirt and water. A FREE helpful installation tip sheet will be included in all wheel and axle kit purchases.