Review on 🛠️ Bang4buck Manifold Gauge Set: Efficient A/C Diagnostic Tool Kit for R22 R134a R410a Refrigeration, Brass Auto Service Set with 5 Feet Length and Case, 1/4 Inch Fittings (Red, Diagnostic Equipment with Case) by Mike Hernandez

saved me a lot of money. Search for refrigerant 410a and you will find many videos. Look at any of them and you will see clues. This set worked for me; connected, pressure checked, 410 added, the split works like new! Without paying $140 for the service, I can now do it for $100, and now my gauge is installed at just the price of freon. $100 for 7#. must last 15 years.