• Interchangeability: • Series 23, ISO 6150, AFNOR:NF. E19.053, US-MIL-NORM C 4109 • Flow Rate: 900 L/Min • Material: • Brass Nickel Plated, Plug Steel, Hardened Zinc or Nickel Plated • Application: General Purpose Pneumatic Coupling, Self-venting New updated version of the 23KE self venting couplings. Still interchangable with the original 23 series couplings.