Review on 🚗 Upgrade Your Car's A/C with the MOUNTAIN 8201 R-12 to R-134a Conversion Quick Connect Coupler Set by Derrick Milkie

works great! One reviewer said he found the easiest way to put them on and he was right. Just press them and they snap perfectly into place. I bought others before I bought these with big blue and red handles to open and close but in hindsight they only had 5 and 6 balls from low to high side but these have 8 balls like high and high. low, and apparently that's a big deal because I had to deal with 5 and 6 stocks as they went in and out with ease. I had to replace my old 5 and 6 ball fittings because I was concerned I might damage my line set trying to tighten them. I wish I had bought others. It's only $5 more, and the difference between that $5 is like night and day.