Genuine AP rear wheel cylinder with 3/4"(19mm) bore Lockheed double piston type as fitted to all cars from 1970 except "S". Includes bleed nipple, retaining clip and gasket. Bleed nipple now 7mm spanner size but same thread-original used to be 6.2mm (1/4"). Also fitted on early cars to 1959-63 and mk2 mini 1967 on except cooper S and all Mk3 from 1970 on except "S". Quantity one per rear wheel and 2 required for car set.