- 90 degree High Side 3/16" Flare (3/8"SAE) - Manufactured from T6 Aircraft Aluminum - Same Strength as Steel - R134a service port adapters will adapt existing R12 service ports to R134a service ports. - Will accept standard R134a Quick Couplers used with R134a manifold gauge sets. - Use when retrofitting from R12 to R134a. - R134a service port adapters meet SAE J639 standards. Note: When using this part remove original valve core prior to installing.