Electrical Metallic Tube, Communications Wiring;Computer Power Circuits and Any Other Designated System;Data Transmission;Health Care Dedicated Circuits;Trace Fire Alarm Application, Red (Tape) Color, 0.824 In;21.00 MM Conduit Inner Diameter, 0.922 In;23.42 MM Conduit Outer Diameter, Electro Galvanized Finish, 10 FT Length, Made In Usa, Flat Rolled Steel Material, 10 CT Package Quantity, Corrosion Resistant Special Features, Ansi Nema Standard;File #E7465;Ul 797;Ul Standard Standards Met, 21 MM;3/4 In Trad