Use with copper, aluminum and the following Parker Parflex Division tubing: Polyethylene Nylon Polypropylene Markets: Industrial Packaging Pneumatic Printing Compressors Marine Features/Benefits: All brass construction Economical Long Nut for vibration UL listed for flammable liquid Meets SAE J-512 Acetal sleeve for use with thermoplastic tubing Applications: Air lines Lubrication lines Cooling lines Fluid transfer Water lines Automotive process Custom configurations and sizes are available upon request.