Height: 5-1/4-Inch, Width: 4-3/4-Inch * Ceramic socket uses one 12-Volt, 20-75-Watt MR16 bi-pin lamp * Copper alloy contacts provide precise spring action - no arcing, will not take a set and pulls to up position for two-circuit application * Polycarbonate transformer housing holds the painted formed steel lamp housing on a swivel arm * 90-Degree vertical aiming capability and 358-Degree rotation