What is in a r12 to r134 conversion kit?

A R12 to R134a conversion kit typically includes various components needed to retrofit an air conditioning system from R12 refrigerant to R134a. This often consists of new refrigerant oil, O-rings, and seals that are compatible with R134a, as well as a new expansion valve or orifice tube. The kit may also come with a charging adapter to facilitate the use of R134a refrigerant. Additionally, it may include instructions for proper installation and system flushing to ensure compatibility.