ITEM NAME:R-12 to R-134a Retrofit Conversion Adapter Fitting 1/4" (7/16 SAE) LOW SIDES Description: It comes with the blue 13mm cap and a removable Schrader valve inside it. This Low side retrofit/adapter/fitting will convert your old 7/16" R12 charging port and make it accept the R134a quick disconnect hose. The fitting comes with a removable Schrader valve. Package Includes: 1 Piece Low Side Port Adapter.1 Piece Low Side Port Adapter. This Low side retrofit/adapter/fitting will convert your old 7/16" R12 charging port and make it accept the R134a quick disconnect hose.