This is a new old stock GE brand EKE halogen projector bulb. Operating at 21 volts and 150 watts, it is used for slide and movie projectors as well as other applications. From the 2-pin base to the top the bulb is 1 3/4". The filament has been checked under magnification and is intact but the bulb has not been tested. Made in the U.S.A. Includes original box.