[43mm MASTER CYLINDER ADAPTER] 43mm master cylinder adapter is specifically designed for Toyota and Lexus vehicles. Before purchase, please confirm that the diameter of your vehicle's brake fluid reservoir is 43mm. [CRAFTSMANSHIP & DESIGN] Made from aluminum alloy with a chrome-plated and blue-oxidized surface treatment, it ensures enhanced durability and corrosion resistance, allowing you to effortlessly perform fluid replacement throughout the entire brake system. [BUILT-IN SEALING RING] Equipped with an integrated sealing ring to prevent leaks, guaranteeing a smooth and secure fluid exchange process. [COMPATIBILITY] Not only compatible with the 3L manual brake fluid bleeder, but also with other manual brake fluid bleeders on the market.