Air Coupling USA pipe stye pneumatic fittings
material: brass
size: 1/4", 5/16", 3/8", 1/2"
working pressure:0-20bar(reach to 25bar)
the fittings can work well even if you test fittings under 40bar within 5-10mins.
for the tube part, size 5*8, 6.5*10, 8*12