Twin filament motorcycle bulb. One spade connection for neutral/earth and two live spade connections for dipped and main beam. PX43T bulbs will not fit car/commercial P43T holders without modification, as the center locating tab of PX43T bulbs is 2mm wider. Correspondingly, H4 PX43T bulb holders will accept H4 P43T bulbs. Compare with H4 P43t which has three locating tabs of equal size. Available versions of this bulb are listed as 'Related Products' below.