Core made of High-Carbon AISI 52100 Chromium Alloy Steel features higher wear resistance, fatigue strength and steel hardness, Premium quality MolyPro™ NLGI Grade 2 Molybdenum Grease (MoS2) to minimize wear and reduce friction providing longer lasting performance, Engineered with with Carbon-Enhanced G-Cast™ (G11H18/G3000) iron castings to achieve an optimal braking performance (strength, stability, durability), Exclusive multi-lip seals are made with ProSeal™ Nitrile Rubber (NBR) which can successfully function at high delta of temperatures while retaining its flexibility and sealing performance, Exclusive G-Coat™ double-layer (8µm) protective coating provides rust protection on 100% of the non-braking surface, Inner rings are made of Case-Hardened Steel for improved resistance to surface wear and contact fatigue, 100% Precision Spin and Mill-Balanced for smoother stopping and zero vibration at any speed, Kit Includes: 2x Rear Kugel Wheel Bearing and Hub Assembly (Both Side) + 2x Rear Coated Genius Brake Drum (Both Side), Kit Variations: K7D-100019 K7D-100260 K7D-100426 K7D-100753 K7D-100885