Bearing Buddy replaces the dust cap in the axle hub, which is filled with grease through the Bearing Buddy. When the wheels are submerged, pressure from the spring loaded piston keeps the water out.  

Hella Behr H84708001 Comes with full manufacturer warranty and usually leaves warehouse same day. Features: High Quality HELLA Installation MaterialsHELLA quality and performanceOver 100 years of excellence in automotive lightingConveniently packaged Product Details: Weight: 14.4 ouncesDomestic : I...