Black adaptor shim for the RAM U-Bolt Handlebar Mount base (RAM-B-231Z) which allows the mount to be attached onto rails or a bike crossbar (eg BMW GS), where the rail diameter is 1/2" to 3/4"

For use on RAM-B-231Z or with these handlebar mount kits, RAM-B-149ZA, RAM-B-149Z or RAM-B-149.