New Philips headlight bulb.  This is a stock replacement (Halogen), Longer Life sealed beam.  This is both the low and high beam in 1 bulb, 35 Watt/65 Watt.  3-pin connector.    Bulb fits either side, LH or RH.  Bulbs are sold individually.  Fits the following:

84-96 Corvette

NOTE : To ensure you are ordering the correct bulb, please match up your connector!