[Premium Quality Materials] Wheel bearing assemblies are manufactured with premium quality materials. The outer ring and flange are made of high quality #55 carbon structural steel for high surface hardness and strength; the inner ring is made of GCr53 high carbon chrome bearing steel with high and uniform hardness after quenching and tempering for high wear resistance and contact fatigue strength.
[Long lifespan] Brand new wheel hub assemblies and studs with rust and corrosion protected surface finish, making it has longer bearing life. Better seal design and triple oil seal, which lasts and minimizes noise and vibration and vibration also keeping moisture and other contaminants out.
[Please Note] If you do not have an installation manual or are not skilled enough to install wheel bearings, it is recommended that you seek assistance from a qualified mechanic.