Metal Handle At End Of Hose Fits Tight Areas And Traps All The Gas. Full Flow Valve uses Standard Gasket And Valve Opener Recognized Assemblies (File Sa9737)Recommended For R-410A1/4" Ryb Plus Ii Hoses Are Rated For 4000 Psi (276 Bar) Minimum Burst And 800 Psi (55 Bar) Maximum Working Pressure And An Operating Temperature Of -20° To 180°F (-28.8° To 82.2°C)Minimum Bending Radius: 6" (152Mm)Made In The Usa. Made in United States. Manufactured by Ritchie Engineering Co.