Powerflex Polyurethane Bush kit for Ford Focus Mk1 inc ST and RS (up to 2006) Rear Anti Roll Bar Mounting Bush 21mm - PFR19-809-21BLK - Please measure bar and select correct size. - Bush Size: 21mm - 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!