This is a Whitz Racing Products 10x15x4mm HyperGlide Ceramic Bearing, a high performance ceramic and stainless steel bearing, designed for performance and longevity.
Features:
Increased Drivetrain Roll
Lower Friction
Cooler Temps
ABEC-5 Rating
Si3N4 Ceramic Balls
Stainless Steel
Includes:
(1) 10x15x4mm HyperGlide Ceramic Bearing