SEPCIFICATION - Standard brass pipe fitting 1/4inch NPT female to 1/4inch NPT female coupling adapter compatible with connecting two male threaded pipes with the same diameter in a straight run.MATERIAL - This pipe coupler is made of high quality durable copper compatible with corrosion resistance, high temperature ductility and low magnetic permeability. Can be used in wet environments; it can also be used with grease, fuels and natural gas, refrigeration, instrumentation and hydraulic systems in low and medium pressure pipe line connections.EASY INSTALLATION - The deep threads design makes fittings bite better, engaged with the object to enhance fixation, no leaking, not easy to slip. Easier and faster installation.OPERATION PRESSURE TEMPERATURE - Max. Pressure: 120 PSI ,Temperature range:-65 to 250 F.PLEASE TAKE NOTICE - This pipe fitting can not be installed compatible with potable water use. And, NPT thread size does not actual diameter, it is only nominal pipe size.size:7.13x6.97x0.87inches Material:coppercolour:GoldPackage Contents:6 x Coupler Reducer AdapterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.