【SPECIFICATIONS】This master cylinder adapter has an internal diameter of 56mm and an external diameter of 79.5mm. 【DESIGN】This adapter is designed let you easily remove and refill fluid into brake system. 【APPLICATIONS】This 56mm master cylinder adapter is used for Honda (including Accord) cars. In order to improve the consumer experience, please confirm whether it is suitable for your model before purchasing. 【COMPATIBILITY】This 56mm master cylinder adapter is also fully compatible with our brake bleeder kits and can help you easily remove and refill fluid throughout your brake system.