Premium Material: Crafted from high-grade plastic and rubber, these conditioning cap valve covers are built to withstand wear and extreme conditions, ensuring longevity and reliability for repeated use in various environments. Wide Compatibility: Suitable for most R134a AC systems, these versatile valve ac caps ensure seamless integration into your vehicle's maintenance routine. Always check compatibility to ensure optimal fit. Sealing Design: Equipped with a robust O-ring seal, these caps effectively leaks while safeguarding against contamination, ensuring your AC system runs smoothly without interruptions or blockages. Easy to Use: Designed for effortless handling, simply affix each labeled aire acondicionado para carro cap ('L' for low pressure, 'H' for high pressure) onto the corresponding port, facilitating quick and accurate pressure identification. Package Includes: The set comprises four durable air conditioning repair valve covers — two for low pressure and two for high pressure — catering to both regular and replacement needs in your automotive air conditioning setup.