<p>Specifications - Standard brass pipe fittings 1/4 inch NPT female to 1/4 inch NPT female coupling adapter is compatible to connect two male threaded pipes of the same diameter in a straight pipe. Material - This pipe coupling is made of high-quality durable copper, which is corrosion-resistant, ductile at high temperatures, and has low magnetic permeability. It can be used in wet environments; it can also be used in grease, fuel and gas, refrigeration, instrumentation and hydraulic systems for medium and low pressure pipe connections. Easy to Install - Deep thread design makes the fittings bite better and engage with objects to enhance fixation, no leakage, not easy to slip off. It is easier and faster to install. Operating Pressure Temperature - Max. Pressure: 120 PSI, Temperature Range: -65 to 250 F. Please Note - This pipe fitting cannot be installed compatible with drinking water. What's more, the NPT thread size is not the actual diameter, it is just the nominal pipe size. Size: 7.13x6.97x0.87 inches Material: Copper Color: Gold Package Contents: 6 x Coupler Reducer Adapter Only the above package contents, other products are not included. Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. The measurement allowable error is +/- 1-3 cm.</p>