These are the Speed Demons Abec 7 oil speed skateboard bearings with clear shields so you can see inside the housing!

Skateboard bearings are what mount your wheels to the axle on the trucks. Bearings determine how smooth and fast your skateboard will roll. Generally, the more money you spend on bearings, the better you'll roll! It is also important to keep your bearings clean to get the most out of them. 

Bearings that have been rated under the Abec scale are known as precision bearings. The scale goes from 1 to 9 - The higher the number, the better the bearings! 

Don't worry about size with bearings, they are all the same. 

This is a pack of 8 bearings - 2 for each wheel.