Quartz Lamp, Fostoria, Size- 3/8 IN, 480 V, Frequency Rating- 50/60 HZ, 3650 WTT, Style- Coiled Element with Sealed Porcelain End Caps, Insert Length- 41-11/16 IN, Housing Quartz. For Use With 462/463 Series Mul-T-Mount Electric Infrared Heater, MM-46A Mitey Midget Electric Infrared Heater