Uniweld UNF3 Nitrogen Flow Indicator with 1/4-Inch Female Flare Inlet Connection and 1/4-Inch Male Flare Outlet Connection<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Nitrogen Flow Indicator， 1/4 Inch Female Flare Inlet Connection， 1/4 Inch Male Flare Outlet Connection</li><li>Provides extremely low pressure (3 to 4 CFH) precision gas flow control for nitrogen purging applications</li><li>Nitrogen Flow Indicator uses a float ball to visually confirm the nitrogen is flowing during the brazing of copper tubing in HVACR systems</li><li>Maximum Inlet Pressure 50 PSI</li><li>Over Pressure Safety Relief Rupture Disk</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31xMnbZrGjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/412jrUoT61L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51elWzKlriL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/512WS0SQFcL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41VnXcAvYpL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51ll6wXqkqL.jpg" noproxy>