Legris 0101 08 13 39 Brass Compression Tube Fitting with bi-Material Seal, Adaptor, 8 mm Tube OD x 1/4" BSPP Male Adapter for connecting pipes or fittings of different types Fitting connects to tubing on one end and has an BSPP male connector on the other Brass for corrosion resistance, ductility at high temperatures, and low magnetic permeability Bi-material sealing washer of zinc-plated steel and NBR synthetic rubber helps provide high-pressure resistance For use with copper, nylon, or plastic tubing