The HVAC caps included in this set are ideal for both professional mechanics and DIY enthusiasts. These caps are compatible with most automotive systems and provide a reliable seal to prevent leaks. To install, just screw the caps onto the service ports, ensuring they are tightly secured to maintain system integrity. Features -Color:Sky-blue -Material:Rubber + Plastic -Size:1.80X1.80X1.00cm/0.71X0.71X0.39in -sturdy materials: constructed from plastic materials, these valve caps are durable and provide effective dirt and leak protection for your car's -Effortless installation: no need for professional tools; these caps can be installed easily and quickly, making maintenance simple and convenient -Ample supply: the set includes multiple caps, providing enough replacements for future use, ensuring you are always prepared -Versatile fit: these caps are compatible with a wide range of car makes and models, making them a versatile addition to your automotive maintenance toolkit -Extended lifespan: by protecting the valves from dirt and leaks, these caps help in prolonging the efficiency and lifespan of your car's system Package list: 20 valve caps