New Yellow Jacket 93842 Compact Ball Valves Pack Of 31/4" ball valves are UL recognized to 4000 psi (276 bar) minimum burst, 800 psi (55 bar) maximum working pressure5/16" for R-410A applications where 5/16" system ports are used5/16" are UL recognized to 4000 psi (276 bar) minimum burst, 800 psi (55 bar) maximum working pressureMade in the USA