Parker's Prestolok PLP nickel plated brass fittings provide a simple way of connecting tubes to a fitting in order to create a fluid distribution network. Prestolok PLP push in metal fittings reduce assembly time by eliminating the use of a sleeve and tightening of a nut required in compression style fittings. Simply push the tubing into the fitting until it bottoms. To disassemble, press the release button, hold against the body and pull tubing from the fitting. Compact one-piece tube, Swivels on all male threaded shapes for assembly in tight places and for precise positioning, Corrosion resistance, Connect for fast assembly and disassembly Air lines, Inert gases, Oil lines, Vacuum lines This listing is for each.