Aluminum Faced Miniature Bi-Pin Socket with 2" diameter Heat Shield for MR16 Two Pin Halogen Light Bulbs This Halogen Bulb Socket fits G5.3 and GX5.3 MR16 bi-pin halogen bulbs Made of high temperature ceramic and aluminum The socket has 12 inch high temperature wire leads The socket is a perfect replacement socket for many applications or as a part for a new fixture Rated to 250V 100W