- Straight High Side 1/4" Flare (7/16"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 part #s 2632 2633 or 2634 remove original valve core prior to installing.