Hubs (Myers) for RMC/IMC, 316 Stainless Steel, Trade Size 4 in, Overall Length 5 1/2 in, Finish Polished, Insulated Yes, Compatible Conduit Type RMC, IMC, Thread Size 4 In., Thread Type NPT, Conduit Fitting Type Hub, Standards UL, For Use With Threaded Metallic Conduit, For Conduit Type RMC, IMC, Overall Height 4 in, Overall Width 4 1/2 in, Weight 4.06 lb, Compatible Conduit Trade Size 4 in, Connection Type Threaded, Includes Stainless Steel Locknut, Indoor/Outdoor Usage Indoor/Outdoor