Low-carbon strip steel that is electric-resistance welded into tubing and then in-line galvanized for superior rust protection. The conduit is then coated with a low-friction organic polymer inside and out to resist corrosion and make feeding wires easier. Before leaving our facility, our EMT undergoes testing to ensure it bends easily without kinking, flattening, flaking or cracking. Colored EMT applications are becoming a normal part of building construction. Each color coordinating with certain applications as follows. Red: fire alarm; Blue: data communications; Green: Health Care; Yellow: high voltage: Orange: Fiber Optics; White: Agriculture. This is 4 in x 10 feet, Colored EMT - Yellow conduit.