They're rubber sealed ball bearings, that provide smooth rotation, great accuracy of accessory and also simplified maintenance.
• 1510 Sealed Ball Bearings x2
• Applications consist of touring car bulkheads, M-chassis vehicle differentials.
• Using ball bearings rather than plastic and steel bearings gives better parts fit and more efficient rotation.
• These ball bearings employ rubber seals versus metal ones – this permits you to definitely open them around clean and focus on them.
• Low-friction oil can be used to lubricate the interior workings.