This is a new Lucas single filament bayonet or 1156 (BAY15S) base 12V 21W side lamp bulb, imported from the UK. It fits the parking, flasher, turn or indicator sockets of many British cars, and the reverse lamps of some others.
Please specify clear or amber.
Ten-packs of these bulbs are available for $12; please inquire.
Dual filament bulbs are also available; see Related Products below.