Brake Master Cylinder Bleeder Kit, 12-Piece Adapter Set

Brake bleeder adapter kit streamlines brake fluid replacement with fast, leak-resistant connections that help you flush systems thoroughly. This 12-piece master cylinder adapter set includes multiple round and rectangular caps to cover common reservoir shapes on many new and older vehicles. Standard ports with American-style A connectors make hookup quick, while a built-in sealing ring helps maintain pressure to reduce air ingress during filling and bleeding.

• Delivers quicker brake fluid changes with secure, pressure-holding master cylinder adapters.


• Fits a wide range of reservoir openings with mixed round/rectangular caps in multiple diameters.


• Connects easily via standard ports and American-type A connectors for smooth workflow.


• Reduces leaks with a tight seal design and integrated sealing ring on key adapters.


• Includes a custom carrying case to keep parts organized, protected, and ready to grab.

Whether you’re servicing daily drivers or maintaining a fleet, this brake fluid replacement adapter set helps prevent messy spills and time-wasting trial-and-error with ill-fitting caps. The durable nylon-and-metal construction is built for repeated shop use, while the assorted sizes support broad compatibility across many vehicle makes and reservoir styles. Keep it in the included case for faster setups on future brake flush, fill, and bleeding jobs. Grab yours today and keep your brake service routine efficient and consistent.

• Set size: 12 pieces


• Materials: nylon + iron (metal components); sealing-ring design


• Carrying case size: 17.52 x 10.83 x 3.54 in (445 x 275 x 90 mm)


• Net weight: 7.05 lb (3.2 kg)


• Inner diameters: 1.33 in (33.7 mm); 1.63 in (41.4 mm); 1.67 in (43.2 mm); 1.71 in (43.5 mm); 1.77 in (45 mm); 1.95 in (49.5 mm); 2.26 in (57.5 mm)


• Adjustable inner diameter ranges: 1.14–2.17 in (29–55 mm); 1.83–3.43 in (46.6–87 mm)