Here is a Pair (1 x Left, 1 x Right) New Old Stock TRW 20.6mm Rear Wheel Cylinders for 

Peugeot 405 Saloon 1.4i, 1.6i, 1.8i, 1.8TD, 1.9i, 1.9D, 1.9TD, 2.0i non ABS 6/1987-5/1997 models.