Through Type Coupler, Application Dental Equipment, Pneumatic Systems, Water Lines, Fitting Side A Connection Type Plug in Stem, Fitting Side B Connection Type Compression, Flow Control Type Flow-through, Fitting Material Brass, Overall Length 1 11/32 in, Specific Fitting Shape Through Type Insert, Finish/Coating Chrome Plated, Material Grade CA360, Fitting Side A Tube Outer Diameter 3/8 in, Fitting Side B Tube Outer Diameter 3/8 in WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov -