Review on GooMeng R1234YF Car AC Refrigerant Charge Hose Kit: Complete Auto 1/2 Acme LH R1234YF Air Conditioning Refrigerant Charging Hose with Gauge by Scott Tompkins

It was great - cheap and saved me a few hundred at the dealer. (They won't add refrigerant, they will do a full cycle and fill.) I saw a few reviews so I was skeptical that this would work, but I noticed that a common theme people mentioned is that was that it was incomplete waterproofing. on the shore and was difficult to attach. This is correct if you don't read the product description. Contrary to what you might think, attach it counterclockwise to the refrigerant can. Easy, I've attached it to my self-sealing refrigerant can a few times with no problems. Using this gauge, I went from an air conditioner blowing out 80 degrees air (outside temperature) to about 42 degrees air in minutes. I definitely recommend it.