ABEC 9 bearings are for wheels on those stunt scooters, you know? ABEC stands for accuracy of assembly, which is rated on a scale from 1 to 11. Higher numbers mean faster spinning wheels. For each wheel, you use two bearings with a little spacer in the middle. The Comet kit has four bearings and two spacer pieces, and you can even get ceramic ones. Ceramic bearings are tougher than steel and last longer. If you want to find and buy Comet bearings, check out our website. We also sell other parts and ship to Moscow and all over Russia.