Features1Silicone Material: Made of high quality silicone, which is flexible and durable, no fear of wear or tear. 2Directly Mounted: Can be directly mounted on the lubrication end of the fitting, no complex steps needed, all can be done in seconds. 3Simple Operation: Easy to use, just let the zerk go through the hole and close the lid to it to complete the operation, suitable for long term use. 4Close Fitting: The grease fitting caps can provide fitness, that these tools has good dust proof performance. 5Compact and Portable: Compact shape, lightweight and portable, does not take up space, can be placed everywhere.SpecificationItem Type: Zerk Fitting CapMaterial: SiliconeModel: RA145Application: For Car, Motorcycle, Oil BrakeWeight: Approx.4g/0.1ozPackage List20 x Zerk FittingCap