One kit will rebuild both rear wheels or axle carrier. Seals ensure exact fitment, keeping debris out Each kit includes necessary bearing and seals Double-sealed ball bearings keep moisture and contamination from entering bearing Lifetime warranty protects you after your purchase. We're confident that our products will work flawlessly once installed in your vehicle. In the rare case that it does not, we'll replace it anytime. If you have a problem, we will take every step to assist you. Contact us for a replacement.