Advanced premium off-road wheel and axle bearing kits contain all elements required for a full service of your wheel hub Factory-Links ball bearing feature a dedicated off-road design with dust seals that offer the ultimate protection against the intrusion of contaminants such as water, mud, and dust Nitrile Butadiene rubber double-lip oil seals and DINP6 - ABEC3 ball bearings have established a categorical improvement over conventional bearings Bearings are packed with a heavy-duty premium marine grease that features special thickeners which allows it to be virtually waterproof to provide unsurpassed rust and corrosion protection. AXLE BEARING KIT REAR