Juno Lighting T863SL Trac-Master Mamba Line Voltage PAR30 Lampholder, Silver Height: 8-9/16-Inch , Width: 5-7/8-Inch Medium base porcelain socket with nickel plated copper screw shell uses one 35-75W PAR30 lamp Copper alloy contacts provide precise spring action - no arcing, will not take a set and pulls to up position for two-circuit application Scooped socket housing made of die cast aluminum 90-degree vertical aiming capability and 360 degree rotation