Legris 3106 08 00 Nylon Push-to-Connect Fitting, Inline Union, 5/16" or 8 mm Tube OD Inline union to connect two tubes Push-to-connect metric tube connections on both ends Nylon for strength and flexibility, abrasion resistance, light weight, and resistance to crushing and cracking 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