Powerflex Polyurethane Bush kit for Caterham 7 (DeDion With Watts Linkage) Front Anti Roll Bar Bush 16mm - PF8-905-16 - This bush is suitable for Road and Black Series applications. - Bush Size: 16mm - PRICE IS PER CAR KIT, NOT per bush. Powerflex usually price their bushes singly, but we have combined the QTY and price to keep it simple for you!