20Pcs/Set R134a/R12 13mm & 13.5mm & 14mm & 16mm &17 & 17.5mm Air Conditioning Service AC System Charging Port Caps（Eight Styles Suit The vast Majority of Cars）

The 20PcsSet R134aR12 13mm & 13.5mm & 14mm & 16mm &17 & 17.5mm Air Conditioning Service AC System Charging Port Caps is a necessary tool set for car owners who want to ensure their AC system functions well. It includes eight different styles of caps that fit the vast majority of cars, making it an all-in-one solution for AC system charging port caps. The set is easy to use and very handy, enabling users to fix leaky stems in their AC systems with ease. Also, the set comes in different sizes which fit different car models. However, there are some drawbacks. Some buyers reported that the valve tool was poorly made and broke while being used to take out the first valve. Additionally, the set comes with no documentation specifying each valve, so users have to visit the product listing page, which only provides limited information with no ability to ask questions. Another concern is that some buyers reported that the caps were cheaply made and could develop holes after a short period, causing refrigerants to escape, which could result in ineffective AC cooling. Despite some drawbacks, the majority of buyers who used the 20PcsSet R134aR12 13mm & 13.5mm & 14mm & 16mm &17 & 17.5mm Air Conditioning Service AC System Charging Port Caps found it useful in fixing their car's AC systems.