The Easy People Skateboard Bearings come in three grades ABEC-5, ABEC-7, and ABEC-9; a small yet essential part. Bearings help the wheels move after a “push”, the grade will help determine how long the bearings spin. The ABEC-5 is best for an intermediate rider, the ABEC-7 is great for a semi-pro rider, and the ABEC-9 is better for a pro-style rider. The ABEC-5s have 5 balls of stainless steel, lightly oiled. The ABEC-7s has 7 polished stainless steel balls, that have grease and oil lubrication. The ABEC-9s have 9 machines polished stainless steel balls, that are pre-lubricated. They come in a pack of 8, in the color blue. These Skateboard Bearings are awesome.