Nuts and stainless steel cones for 1/8 'and 1/16' tubing listed below are of high quality. Fittings and cones are listed for Valco valves which can also be used with most valves and connectors of other manufacturers. Rheodyne type connectors and cones are also described. The fittings called 'universal' can be used both with Rheodyne or Valco connections. The two-way stainless steel connector (unions) of are designed for joining two tubing of 1/16 'or 1/8' O.D. of the same O.D. or for attaching 1/8 'and 1/16' O.D. tubing. Its manufacture places special emphasis on precision machining, in hole concentricity and surface finish to ensure that it is absolutely leak free.