Specifications: Material: High quality solid brass Quantity: 2 × Brass couplers Features: 1. Operation temperature range of 53 to 121°C (65 to 250°F), Operation pressure up to 1200 PSI, corrosion resistance, high temperature ductility and low magnetic conductivity. 2. NPT standard threads allow fittings to engage better with objects for enhanced retention, while smoother threads make installation easier and faster. 3. Brass pipe fittings can be used to connect all kinds of pipes, such as air pipes, fuel pipes, water pipes, and air tools, and can also be used for grease, fuels and natural gas, refrigeration, instrumentation and the hydraulic system. 4. Sturdy and durable material, brass is very suitable for hose system, it can withstand long time wear. There is a hexagon in the middle of the fitting to add support when adjusting the appropriate wrench. Note: 1. For better sealing, it is recommended to use Teflon tape for accessories. 2. The size of the NPT thread is the nominal pipe size, which does not represent the actual pipe diameter. Please refer to the product drawing for the specific size. Before purchasing, please choose your own suitable size.