PROTECT YOUR BLEEDER SCREWS WITH OUR BRAKE BLEEDER CAPSProduct AttributesColors: BlackSizes: 0.47*0.47*0.4 inch / Bottom ID: 0.24 inchWeight: 0.44 ozMaterial: EPDMPackaging: Brake Bleeder Cap*18Product Functions & Features1. Protective Effect: After installing grease zerk caps on the bleeder screws, there is no longer any fear of dust, etc. getting into the bleeder screws2. Soft EPDM: EPDM material is soft and not easy to deform, it can work stably in a wide temperature range and provide long-term protection3. 18PCS: No need to worry about accidental loss during use, sufficient quantity, can be used as daily spare parts