VN Series HVAC Nitrogen Purging Regulator Flowmeter, 35 to 25 SCFH Purge 3 to 6 SCFH Braze, 5 1 2 in L, CGA 580 no checkout Versatile fastening tool offers user Versatile fastening tool offers user multiple fastening options in a single tool design Wrench has laser etched SAE MM scales and wide jaw opening Pass thru reversible ratcheting system works over long threaded rod where normal ratchets and sockets won’t fit Every pass thru socket replaces one standard and one deep Universal design fits 6 fastener types—hex lifting or turning Hybrid design—regulator and flowmeter all in one Easy to read nitrogen cylinder content gauge with preset flow rates Heavy duty brass body designed for rugged field use No adaptors needed