Powerflex Polyurethane Bush kit for Vauxhall / Opel ASTRA MODELS Rear Anti Roll Bar Mount (inner) 20mm - PFR80-415-20 - - Bush Size: 20mm - 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!