Brand: Williams Comfort Products. Part Number: P323663 . /// Williams Comfort Products P323663 Vent Saftey Switch 200F --------------------- Please note: Your part number HAS to be EXACTLY the same. SIMILAR part numbers will NOT work. If you are unsure, please ask us and we will look up the right part for your application. We have to charge a restocking fee if you order the wrong part. Thank you.