Feature:The master cylinder reservoir cap prevents moisture from entering and flowing into the fluid. It is durable and has good sealing performance, which is consistent with the performance of the car cover.Easy to install, direct replacement for old or broken brake master cylinder oiler caps.This is a non-OEM product, accessory only! Specification:Type: Brake Master Cylinder Cap CoverColor: BlackMaterial: Plastic, MetalFitment Type: Direct ReplacementPin Number: 2Cap Size: 7.7x5.3x8.2cm / 3.03"x2.09"x3.