8x19 Rubber Sealed Ceramic Ball Bearings (2) 8x19x6 698-2RS/C INCREASE SPEED, ACCELERATION, and EFFICIENCY - Ceramic Ball Bearings are up to 50% lighter than Standard Steel Ball Bearings. The Ceramic Balls are 4x smoother than Steel Balls (lower friction coefficient). Due to the smoothness and light weight of the balls, Ceramic Bearings will have reduced heat, wear, and skidding. This results in a much more efficient bearing, which will have a longer life, a 30-50% higher speed rating, will spin more freely, and will spool up faster! Includes Two (2) High Speed Ceramic 8x19 Ball Bearings. These bearings are perfect for any applications where 8x19x6mm 698 ball bearings are required. Advantage Ball Bearings are perfect for a variety of applications including: RC Cars, RC Helicopters, Bicycles, Fishing Reels, Robots, Spinners, Inline Skates, Skateboards, Scooters, Tools, Machines, Vacuums, Electric Motors, Nitro Engines, Drones, Yo Yos, and more! Rubber Sealed Ball Bearings have maximum protection, and are ideal for dusty or dirty environments. They protect well against exposure to dust, dirt, and moisture, which can destroy bearings. Advantage Racing Product Bearings have been run by some of the fastest RC Car Racers in the world and have won multiple ROAR US National Championships. Over 250,000 bearings have been sold to satisfied racers all over the world!