Features: Industry-wide interchangeability. NWB Series couplers and nipples are the Industrial Interchange design and meet the dimensional requirements of Series B in ISO 7241-1.Large flow areas machined into the body of the coupler and nipple facilitate flow around the valve, for a high flow capacity. General purpose couplings, are used across the spectrum of hydraulic applications. Use: Primarily used in hydraulic and/or gas systems, Manufactured from brass, steel and stainless steel as standard materials. A wide range of seals allow these couplings to be used with a broad range of medical, chemical, food, and more special request industry. Instructions: Material: carbon steel, zinc plated Valve element: poppet valve Seal: Std. NBR Retainer ring: PTFE Temperature Range (std. seals): -25 degree to +125 degree Special type: on request