Liquid-Tight Flex Metal Conduit Trade Size 4 in Bend Radius 11 in Color Gray Approval Rating CSA UL Steel Jacket Material Flame Retardant PVC Max Operating Temp 221 Degrees F Min Operating Temp -67 Degrees F Nominal Length 25 ft Finish Galvanized Flammability Rating UL 360 Flexibility Flexible Indoor/Outdoor Usage Outdoor Only Inside Diameter 4 in Jacket Color Gray Jacketed Yes Liquid Tight Conduit Application Metallic Outside Diameter 4.5 in