[Size Description]Low side r12 to r134a conversion adapter: 1/4inch(7/16inch- 20) x 13 mm (Blue); High side r12 to r134a conversion adapter: 1/4inch(7/16inch- 20) x 16 mm [Premium Aluminum Material]r12 to r134a retrofit adapters are made of high quality Aluminum material,with excellent sealing, , solid and feature [R12 to R134a Conversion Kit]The r12 to r134a auto conversion kit comes with 3pcs r12 to r134a high side adapter, 3pcs r12 to r134a low side adapter, 3pcs valve core removal tool [Great R12 to R134a Convert Adapter]The low/high side r12 to r134a convert adapter can convert your old 1/4inch SAE or 7/16inch-20 UNF R12 R22 charging port for fiting r134a quick charge hose, tool for automotive air conditioning refrigerant systems [Wide Application]air conditioning conversion adapter kit is completely used for replacing r12 r22 with r134a charging port 1/4inch SAE or 7/16inch - 20UNF adapter. It's a ideal air conditioning conversion adapter kit for repairman, Manufacturer: Akfldms