WIDE COMPATIBILITY---These low and high side coupler connectors are suitable for A/C R-134A manifold gauge sets, coupler interface fits with R134A service ports, 1/4" male flare. The r134a connector with adjustable coupler (5&6-ball style) is compatible with all models. QUICK COUPLER THREAD---R134A low side 13mm (Blue), R134A high side 16mm (Red) with M14 and 1/4" SAE adapter. EASY TO INSTALL---Connect bottoms with R134A service port; install the ACME adapter with the refrigerant hose; turn on/off the switch at top to turn it on/off. PREMIUM QUALITY---The blue and red quick adapters are made of high quality aluminum alloy and brass material, and design with an integral safety valve core, durable and long-lasting use. NOTE---International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Weight: 0.7936641432 Pounds, Manufacturer: Aupoko