The two built-in pipe connection valves have a double-seal system in . NPT male and male and male threaded threaded pipe fittings, Sus304 body and ball provide extra strength and resistance. stainless handle for increased life, fast 1/4 turn on or off. Standard port valve size is small Each valve is individually tested for safety up to approximately water, oil, and natural gas (not freeze). This mini ball valve is made from sus304 for greater resistance and blow-out anti-drying to reduce leakage and valve damage. This standard port has a built-in valve with a male national tube taper. The NPT line is used to connect the two female threaded tubes in the same direction. This mini ball valve has a maximum operating temperature of 325 Fahrenheit for air, water or inert GAS applications., Weight: 0.21715532807 Pounds, Manufacturer: rirue