This set of 4 rubber hose caps and blockoff plugs are a must-have for any vehicle owner. Specifically designed for use with a 5/8" water pump heater core, these accessories are perfect for blocking off any unused connections or ports. Made by CRG, a trusted brand in automotive parts and accessories, you can trust that these caps and plugs are of high quality and will last for years to come. In addition to the caps and plugs, this set also includes a cap for added protection and convenience. With a warranty included, you can feel confident in your purchase, knowing that you are getting a reliable product that will meet your needs. Order now and take the first step in maintaining your vehicle's heating and cooling systems.