Twincam ILQ-9 Pro bearings are designed to elevate skating speed and performance with its long lasting, cutting edge components. The exclusive 6-ball bearing design helps improve speed, hold larger weight loads and create less void in the bearing for a smoother, frictionless spin. SCRS (S-Channel Rubber Shield) system helps prevent contaminates from entering the bearings allowing consistent spin speed with a longer bearing life. The TK racing gel (Made in the USA) lubricates the bearings for an extremely fast ride. The higher the number at the end of the bearing indicates a higher level of precision, tolerance and speed. Includes 16 bearings and 8 spacers in a reusable storage box.