Description:

Reduce friction inside the hub of the bearing by adding durable SPACERS and WASHERS.
Make your bearings stress-less and prevent your bearings from exploding or seizing.
Increase your wheel & speed and bearings & life by adding Professional Speed Kit.
Good axial and radial support performance, durable choice for high speed rotation.
Designed for skateboarding, long board, inline skate.

Specification:

Material: Steel
Size:
Iron Box: 8.5x8.5x2.1cm/3.3x3.3x0.83inch

Package Includes:

8 Pieces Skates Ball Bearings