Powerflex Polyurethane Bush kit for Vauxhall / Opel Calibra (1989-1997) Rear Anti Roll Bar Mount (inner) 18mm - PFR80-415-18 - - Bush Size: 18mm - 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!