<p>These bearings are 627, which means they suit almost all wheels (outer diameter) and suit 7mm axles (inner diameter). </p> <p>These are a great pricepoint bearing for using with Boen, Bont Infinity and Roll Line plates, as well as some DA45 7mm trucks which can come on Avengers and some older Sure Grip plates.</p> <p>Pack of 16, 7mm bearings. It's worth noting most derby plates use 8mm axles, for which you'll need 8mm bearings like the Bont ABEC 7s.</p>