Lampholder, Keyless, Single Circuit, 660 W Lamp, 250 V, Incandescent Lamp, Medium Lamp Base, Screw Terminal, 1/8 in IPS Pipe Mount, Aluminum Shell/Phenolic Interior, Brass, Polished Gilt, 1.38 in Dia x 2.59375 in H, Standards/Approvals: CSA File LR-1863 Certified|NOM 057 Certified|UL File E3810 Listed