Lower Chain Roller. Line of heavy-duty chain rollers that have additional seals to increase bearing life. High-performance rollers for replacement of OE chain rollers. Note: Image is for display purposes only, actual Lower Chain Roller may vary depending on your application. Bolt is NOT included. Detailed Specifications: 1 ball bearing(s). 1 bushing(s). 2 miscellaneous part(s). 1 polyurathane roller(s).