one touch tube fittings 1.standard: Metric, Inch,NPT 2 ... 1/2" 4.stock available one touch tube fittings Features :A.convenient one touch fittings provide instant tubing connections.B ... material cutting , machine processing for brass ,plastic cap and rubber seal injection ,assemble ,thread painting ,testing ,package .testing ... ,especially for USA , France , European clients . one touch tube fittings