Tillett TBB5 Aluminium Side Mount Seat Bracket Set - Suits Tillett B5 SeatsB5 CAR SEAT BRACKET SET, FOR USE ON DROPPED FLOORS OR TILLETT RUNNER SYSTEMS. TBB5 brackets are specifically made for the 23cm hole centres in the sides of the B5 seat. They are 30mm shorter than the similar TBB5T and therefore can either be used on top of Tillett seat adjustment runners, or where the central seating area is in a depression lower than the mounting surface under the brackets. The brackets have holes and slots to allow the seats to be