Marchal type, 6 volt double contact BA21d three pin base, 45/40 watt double filament bulb. dimensions 39mm wide x 58mm tall with 20mm cap, use headlight. For a yellow version of this bulb please see B5912BY. For 6, 12 and 24V LED options, please see part numbers BA21DLED-H25YL (yellow) and BA21DLED-H30L (warm white) both with an integral lens that focus their own beam of light.
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