Features: Built-in automatic open/close valve. Applications: For medium pressure applications with built-in automatic open/close valve in sockets and plugs. Material/finish: Body: Stainless steel; Seal rubber: Nitrile rubber (NBR); Set contents/accessories: *Note: Pressure resistance (MPa): 4.5; Opposite mounting size: R1 1/2; Maximum operating pressure (MPa): 3.0; Fluid: Air, water, operating oil, etc.; Size: Rc1 1/2" female thread; Material: Stainless steel US304) Maximum Working Pressure: 45 kgf/cm2; Seal Material: NBR; Usable Temperature Range: -4°F to 176°F (-20°C to 80°C).