Flexible Metal Conduit – Reduced Wall, Finish Galvanized, Aluminum, Trade Size 3/8 in, Inside Diameter 0.38 in, Outside Diameter 0.61 in, Bend Radius 2 in, Overall Length 500 ft, Flexibility Flexible, Corrosion Resistant, Gray, Conduit Type Reduced Wall, Series 5600, CSA 69271, Federal Specification AA-5810 Type II, R14147, UL 1479