Metallic Conduit (RMC) Heavy-Wall 304 Stainless Steel Trade Size 4 in Inside Diameter 4.02 in Outside Diameter 4.5 in Wall Thickness 0.23 in Nominal Length 10 ft Conduit Type RMC Gray Conduit Style Conduit Full NEC Compliance UL File #E230584 UL/CUL Listed UL 6A and ANSI C80.1 Connection Type Threaded Finish Polished Max Operating Temp 1 600 Degrees F Min Operating Temp -150 Degrees F Overall Length 98 7/16 ft