- Our air conditioner charging port caps are designed in six sizes (13mm, 13.5mm, 14mm, 16mm, 17mm, and 17.5mm). Each cap features an integrated rubber seal that effectively prevents leaks while resisting pressure and corrosion. - Ideal for both professional car technicians and automotive enthusiasts, these caps are essential for accurate air conditioning maintenance and repairs. - The straightforward installation process makes these maintenance caps a must-have in your toolbox, ensuring your car's air conditioning system operates efficiently and prolonging its lifespan. - Crafted from high-quality materials, these connection caps protect service ports from dirt and damage, safeguarding your vehicle's air conditioning system. Use Scenarios: 1. When performing routine maintenance on your vehicle’s air conditioning, these caps keep service ports clean and secure during and after service. 2. For car restoration projects, use these caps to prevent dust and moisture from compromising your air conditioning system while the car is being worked on. 3. During professional repairs, these caps ensure that refrigerants are safely stored, reducing the risk of leaks and system failures. Choose our air conditioner charging port caps for durability, compatibility, and reliable performance in all your automotive air conditioning needs.