KBC HRB6403KB hydraulic release bearing, also called a concentric slave cylinder. Fits: Opel Astra 1.6/1.8/2.0/2.2 99-05, Opel Zafira 1.8 01-05 (F18 gearbox only). Manufactured and wholesaled by KBC Brake & Clutch, South Africa. Send a photo or your vehicle details to confirm the correct fitment.