Valves are the correct port size for high/low AC connections. The need for a crossover arises when your current AC connection is 134 and not 1234. This is a complete set, those you don't use are superfluous, but many people use them on other car models. When you buy a new car, you need "extra". Goodbye.
VIVOHOME 220LB HVAC Electronic Digital Refrigerant Charging Weight Scale β High Precision with Protective Case
9 Review
πͺ Enhanced Universal R134A Valve Core Remover/Installer by Mastercool (81290)
9 Review
π¨ Robinair (15115) VacuMaster Single Stage Vacuum Pump - For Efficient Single-Stage Vacuuming, Delivers 1.5 CFM
9 Review
π UView 560000 Combustion Leak Tester: A Reliable Tool for Efficient Diagnosis
9 Review