The R12 to R134A Adapter is a set of conversion adapters designed for retrofitting high and low fitting ports. Made of metal and plastic, these adapters come in a blue and red color scheme with a thread size of 7/16 to 20UNF. The set includes 4 pieces and is manufactured by Aupoko in the United States. These adapters are lightweight at 60 grams and provide a secure connection for R12, R22, and R134A refrigerants, ensuring compatibility and optimal performance for your system.