... corrosion and anti-contamination5 All R and NPT threads are pre-coated sealant6 quick and simple tube insertion7 compact, light ... specializing in producing air tool, air tool accessories, AIR CONNECTOR, auto parts and tire repair tools, such as quick ... innovation.If you need the quick couplers, quick coupling, PU connector, brass fittings, tire chucks, tire gauges,plugs , mini compressors , ...