Features: 1. Universal air conditioning charging port cover, suitable for AC system of most vehicles. 2. Effectively prevents dust and particles from entering the filling port, helping to avoid clogging. 3. Includes 5 high side port caps (16mm ID) and 5 low side port caps (13mm ID). 4. Practical accessories for car air conditioning replacement and maintenance. 5. Made of high-quality ABS material, offering pressure resistance and corrosion resistance for durable use. Specification: Item Type: AC Charging Port Cap Material: ABS Included: 5 x Low Side Port Cap, 5 x High Side Port Cap Low Side Port Cap Inner Diameter: Approx. 13mm / 0.5in High Side Port Cap Inner Diameter: Approx. 16mm / 0.6in Note: Professional installation is recommended.