Pigtail Lampholders - Medium Base for use in electrical equipment, harnesses, light strings and related applications. Wire leads are 5" (127mm) of color-coded stranded wire, stripped 1" (25.4mm) for easy connection. Rubber sockets have an extended lip to seal against bulb. Metal shell interiors are aluminum, 145 nickel-plated copper. 124 weatherproof socket has sealed leads where they enter husk.