(P)(B)Bluezone replacement bulb for:(/B)(/P) (P)(B)VRI/FRI Column Refrigeration (/B)(/P) (P)(B)VBI/FBI Bottom-Freezers (with vertical Bluezone, as shown in picture). *Please check model # on serial tag, if it ends with 00, you will need the RBZB7 horizontal bulb.* If you have questions about the correct bulb please call 662-451-6750 (ext. 3)(/B)(/P) (P)Ensure clean air and freshness in your refrigerator with a Viking Bluezone Replacement Bulb subscription. Order individual Bluezone bulbs or signup for our automatic replenishment program and receive your Bluezone Replacement Bulb automatically every 6 months. (/P) (P)(For the VRI/FRI and VBI/FBI Refrigeration it is recommended to replace your Bluezone bulbs every 6 months)(/P) (P) With a Viking Bluezone Replacement Bulb subscription, you'll never miss a bulb change again. (/P)