Generic Brass Pneumatic Muffler Filter 1/8" Male NPT Noise Reduce Air Solenoid Valve Silencer Connector (Pack of 5) Materies:base,brass(muffling element, sintered bronze) . Net Weight: 7.79g/pc. Thread: 1/8" Male NPT. Working Pressure: 0-116 PSI. Working temperature: from -10 to +70 ?C.