These high-quality A/C service port caps are essential for anyone involved in automotive air conditioning repair, helping protect service ports on a wide range of vehicles from debris and damage. Designed for both professional automotive technicians and car enthusiasts who perform precise repairs, these caps help maintain cleanliness and prevent accidental contamination during service. Keep your vehicle's air conditioning system sealed during servicing with our 20-piece set of R134A service port caps, built for durability and broad compatibility. The caps are available in six sizes: 13 mm, 13.5 mm, 14 mm, 16 mm, 17 mm, and 17.5 mm. Each cap includes a rubber seal to prevent leaks and to resist pressure and corrosion, ensuring a reliable seal across common service ports. Key benefits - Protects service ports from dust, moisture, and physical damage during maintenance - Helps maintain system integrity while performing charging, evacuation, or leak testing - Compatible with a wide range of R134A service ports and vehicle makes/models - Rubber seal provides a reliable leak barrier and resists pressure and corrosion - Durable construction and a 20-piece set for convenient coverage of multiple ports Use scenarios - Professional shop use during A/C recharge, evacuation, or leak testing on various vehicle makes and models - On-site fleet maintenance where technicians service multiple vehicles with different port sizes - DIY or home enthusiasts performing routine A/C maintenance or temporary sealing of ports when not actively connected This product combines function, compatibility, and practical coverage in a compact 20-piece set, helping to keep A/C systems clean, sealed, and protected during service.