Universal FitmentThis A/C Valve Core Cap is universal air conditioning charging port cover, suitable for AC system of most vehicles. Low Side Port Cap Inner Diameter: Approx. 13mm/0.5inches, High Side Port Cap Inner Diameter: Approx. 16mm/0.6inches. Pratical Function and Excellent qualityAir conditioning service cap can effectively prevent dust and particles from entering the filling port, avoid the filling port from clogging. The cap of the refrigerant filling port can prevent the filling port from being blocked. The service ports are the most common leak point in the AC system. High Quality MaterialThis AC Refrigerant Port Cap is made of high quality ABS material, pressure resistance and corrosion resistance, durable to use. Package ContentPractical accessories for car airconditioning replacement and maintenance. The Package includes 5pcs high side port caps(16mm ID) and 5pcs low side port caps(13mm ID). ServiceWe are responsible for the product and believe in the quality of the product. Professional functions and high reliability give you a different experience and ensure every customer's satisfaction. If you have any questions about our products, we will answer them at any time.