Legris 3106 56 00DOT Nylon & Nickel-Plated Brass Push-To-Connect Fitting, Complies with DOT, Inline Union, 1/4" Tube OD Inline union to connect two tubes Push-to-connect tube connections on both ends Nylon body and nickel-plated brass sub-base Handles pressures up to 290 psi (20 bar), operating temperature range of-20 to +80 degrees C (-4 to +176 degrees F), and a vacuum capability of 755 mm Hg Meets RoHS and ISO 14743 technical specifications