【Wide Compatibility】 - The high/low 90 degree angle side quick coupler with R134A tank adapter are suitable for R134A air conditioner manifold gauge. 【6 Ball Style Couplers】 - This r134a quick coupler design with 6 ball style, and have a snap lock coupler for quick connect. R134A high side 1/4’’ FL-M x 16 mm R134A (Red), and R134A low side 1/4’’FL-M x 13 mm coupler(Blue) 【Useful Tank Adapter】 - This R12 to R134A adapter kit comes with an extra R134A refrigerant tank adapter, 1/2" Female and 1/4" SAE Male, connects to 1/2"ACME R134A manifold. 【Premium Quality】 - AC quick connector fittings kit are made of heavy-duty brass for durable using, knurled grip ring for easy, no slip use, features with long-lasting to use. 【1 Year Warranty】 - This R12 gauge conversion kit with quick couplers comes with 12 months warranty. If the conversion kit fails or any other question, please feel free to contact us.