Use with copper, brass, aluminum, or plastic tubing. Three piece construction - nut, sleeve and body with attached insert. Easy to disassemble no flaring tool required. Primary uses water, gasoline, oil and vacuum lines.Tube O.D. size: 5/8Three piece construction - nut, sleeve and body with attached inserttemperature range: -65 degree F to +250 degree FUse with copper, brass, aluminum, or plastic tubingEasy to disassemble no flaring tool requiredPrimary uses water, gasoline, oil and vacuum linesLead free compliant product which meets public law 111-380Carded.