Features: Ensures your vehicle air conditioning systems remain sealed and uncontaminated with our comprehensive 20piece set of R134A/R12 service port caps, designed for durability and compatibility. Our air conditioning systems charging port caps come in six sizes (13mm, 13.5mm, 14mm, 16mm, 17mm, and 17.5mm), each featuring a builts in rubber seal to prevent leaks and resist pressure and corrosion effectively. Suitable for professional automotive technicians who require parts for air conditioning maintenance, as well as for car enthusiasts looking to perform repairs with precisions. These quality plastic air conditioning port caps are essential for anyone involved in auto air conditioning repair, ensuring that service ports on various vehicles are protected from debris and damage. With easy installation, this set of air conditioning service caps is a must have addition to your toolkit, keepings your car's air conditioning systems functioning efficiently and extending its lifespan. Specifications: Texture: Plastic Size: As Pictures Show Package Includes: 20x Quick Coupler Lid note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.