Outlaw Racing OR3074BK Chain Roller Guide 34x28mm Black Predator 500 MX125 MX250 Part fits both Upper AND Lower or varying models, please contact us for assistance finding the correct bearing. Designed as a direct replacement for the OEM design. Where Applicable rollers feature an outer mechanical seal to protect the bearings from dirt and water and include mounting hardware. SIZE: 34x28mm. This chain roller comes in BLACK.