Coupler Interface Fits with R134 Service Ports,1/4" Male Flare.
Aluminum switch, bronze ACME adapter, and nickel plated bronze body.
Adjustable rotary switch for low and high adjustament.
Accurate snap lock and knurled grip ring for easy operation; detachable copper adapter for easy maintenance.
Method of use: connect bottoms with vehicle's R134a service port; connect the ACME adapter with the refrigerant hose; turn on/off the switch at top to turn it on/off.