Made of ABEC-7 chrome steel. Double-side shielded.

For all chassis with 1/4" (6.4mm) chassis hole.

TECH TIP     These bearings are manufactured to incredibly tight tolerances but the axles you might be using are likely not so. To use these properly you will need to hand fit the axle you are using to the bearings for proper performance and reliability. Be sure to never press fit an oversize axle into the bearing - if you do that the bearing will be destroyed by the balls embedding themselves into the bearing races (brinelling the races).