and Long-Lasting : Made from brass , these conversion heads are built to withstand frequent use and last for Easily Convert Between 1 / 2ACME and R134a : This set of 2 brass conversion heads allows you to easily switch between 1 / 2ACME and R134a refrigerant fittings , making it a must-have for any HVAC technician or enthusiast Simplify Your Refrigerant Fitting Needs : Say goodbye to the hassle of constantly switching out fittings and simplify your refrigerant fitting needs with this and conversion head set Versatile Usage in Various Settings : These conversion heads can be used in a variety of settings , such as automotive air conditioning systems , home AC units , and refrigeration systems Suitable for HVAC Technicians and Enthusiasts : Whether you ' re a professional HVAC technician or a enthusiast , this conversion head set is the perfect tool for your refrigerant fitting needs, Manufacturer: Watreketal