7mm ID bearings are almost exclusively for Roller Skates. These bearings WILL NOT WORK WITH SKATEBOARDING OR ROLLER HOCKEY SKATES.

SPEED - Amphetamine Diva bearings are strong ABEC 7 bearings capable of high speeds and durability.

PRODUCTION - Amphetamine Diva ABEC 7 bearings have 8 hardened ball bearings for impact absorption and gas-washed surfaces to provide less friction. Ensuring a smooth ride.

FEATURES - Removeable Non-Contact, Frictionless Rubber Shields. Removeable High Speed Nylon Ball Cages.

PRE-LUBRICATED - Amphetamine bearings are pre-lubricated with Amp Synthetic Speed Oil and are ready to provide high speeds straight out of the package.

INCLUDES - 16 Bearings which is enough for 8 wheels. These bearings are size 627, these bearings fit 7mm axles which is for Derby / Quad Skates. These will not fit on a skateboard or normal size rollerblades!