Diameter: 8mm
 Pack of 16 bearings
 Contrary to the photo: the bearing ring is black , not red :)

 KwiK ABEC-5 bearings are made with high-quality chrome-plated steel rings and have proven to provide smooth rolling every time. The 5 is part of the ABEC bearing rating system and indicates the bearing's resistance. The higher the number, the longer it will take for your wheel to stop spinning after you stop pushing.
 When shopping for a set of bearings, be sure to consider the quality of the bearing components. Bearings consist of rings, balls, cages, and shields. The main difference between quality bearings and cheap imitations lies in the material used for the bearing rings. Chrome steel rings are far superior to cheaper carbon steel rings, which tend to significantly slow down the bearings when pressure is applied.