Rear wheel cylinder (late) non genuine

Non genuine -All later models have these 3/4″ bore double piston cylinders for the rear brakes.INCLUDES BLEED NIPPLE AND CLIP. The gasket 37H4642 is not supplied but these non genuine type have proven very reliable. Repair kit is GRK2014.Bleed nipple now 7mm spanner size but same thread-Used to be 6.2mm (1/4″). Made aade in the EU-See GWC1102 genuine for application.USE 660510 Bleed Spanner Quantity one per rear wheel and 2 required for car set.