ROVER 4241179, GWC1212. UNIPART GWC1212. Type Wheel Brake Cylinder. Fitting Position: Rear Axle Left; Fitting Position: Rear Axle Right; Brake Type: Disc Brake; Brake Type: Drum Brake. TRIUMPH TR 7 II 2.0 Convertible Petrol 05/1979 12/1981 RWD 8 106 78.