After a few mishaps with pre-made blister packed valve cores I decided to squander them, believing that the cost of cheap valves and wasted refrigerant canisters probably outweighed this. I've only used two so far - one on the high side, the other on the low side of an R12 to R134a conversion - and they've held up for the past two months. I'm perfectly satisfied.
Enhanced Elitech ILD-300 Infrared Refrigerant Leak Detector: Advanced HVAC Halogen Tester with Selectable Gas Functionality
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