2 PACK of Genuine GE part number WB25X10019 Avantium Halogen Light Bulb. Rated 20 Watt at 120 volts. Roughly 1-3/4" Long (from end of glass to end of pins) & 1/2" wide glass & 2 pin base - 3/8" apart. Replacement for numbers AP4380308 and PS2351821. Designed to fit specific General Electric Advantium Manufactured Microwave Oven Models.