Material: Nickel-plated brassMembrane: PES polyether sulfoneO-ring: NBROperating temperature: -40 °C to 110 °C. DEGREE OF PROTECTION: IP 66 / IP 68 / IP 69K. Water inlet pressure > 12.0 psi / 0.83 barAir flow: > 90ml / min / cm2at 10 mbar