Forney 87151 Reverse Flow Check Valves， Regulator to Hose， Fits B-Size， Pair<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Prevents accidents caused by reverse gas flow</li><li>Fits regulators with CGA B size 9/16 outlets</li><li>Meets UL standards</li><li>Includes one fuel gas and one oxygen check valve</li><li>Regulator to hose</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41wVPeXNIjL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41NCmtEMv8L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41LJHlj9oWL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41arhT7mEHL.jpg" noproxy>