Microwave incandescent light bulb, 40 Watt. Comes with small screw in base. If the light bulb threads are corroded, or the bulb base is too large, the socket may also need to be replaced.
25 watt light-bulb for various appliances, 120 volts, small base screw-in. Bulb has been updated and you may need the recommended socket to install this light bulb. Also bulb is no longer blue tint per factory.