Car brake bleeder nipple caps replacement for most cars, motorbikes, bikes ect to provide sealing protection for the exhaust screw. [Firmly installed] : The rubber zerk covers brake caliper dust cover adopts inner rib design, firmly fixed, convenient and quick installation, saving time and effort. This motorbike brake bleeder kit can cover the bleeder screws, keep the screws clean and prevent dust or rain from entering the screws. -The inner rib design can be better fixed and firmly tightened, saving time and effort - Provide your bleeder screws with the most comprehensive protection from dust and rain, effectively extending the life of the metal fuel nozzle. Specification: Item: 18pcs Car Brake Bleeder Screw Caps Color: Black Material: Rubber Size:0., 46×0., 4inch/1., 16×1., 01cm/ (W*H) Application: Universal fit Features: - high quality rubber material, excellent performance, not easy to deformation and aging, good sealing. Aazon.co: 120 Pcs Rubber Grease Fitting Caps Brake Bleeder Screw Caps Dorman HELP Brake Bleeder Screw Caps, Vehicle Type: Universal -The inner rib design saves time and effort in installation, closely fits and firmly installs. [Protection Function]: The grease fitting caps perfectly covers the exhaust screw, effectively protects the brake exhaust hole from the erosion of wind sand, dust and rain, and prevents the metal nozzle from corrosion and rust. Its design takes into account the user experience, the internal ribbed design makes the dust cap can be firmly fixed on the brake system, will not easily fall off. Rubber Dust Covers For Brake Caliper AOCISKA 18 Pieces Brake Bleeder Screw Caps,Grease Zerk Fitting Cap Rubber Dust Stem Cover, Universal Brake Caliper Dust Cover Brake Bleeder Nipple Capbrake Bleeder Rubber Caps For Cars And Motorcycles Universal Dust Cover For Bleeder Nipples Installation is very easy, no professional tools are required, and it takes only a few minutes to complete.