Our kit has everything the DIY'er or Pro needs to use their HVAC gauges to recharge their 134A car refrigerant. Works on all R134A cars/trucks as well as with all standard hoses/manifold sets. You might not buy our product but we would ask you consider two things before buying another set. We supply these adapters vs other adapters because they have built in pressure safety valves, can be turned off at the car, and are sturdy enough to last. If you look at some of the name brand AC tool companies they sell these not the other cheaper adapters, and trust me it is for good reason. These are better. Please do not waste your money buying aluminum can tap valves. They work twice and then the threads are done. We supply brass because it is more durable than aluminum and will last.