Lego compatible mecanum wheels

These are small mecanum wheels that can be assembled with lego parts and support a lego axle.

Note: If the rollers are attached with lego then they should not be used in a drive system.
They were designed to be used as a ball intake which has them under much less load.

Also Note: the rollers must be wrapped in electrical tape (or similar) to provide them with enough friction to work effectively.