Fan motor for Peri-Pro processors (90000) serial # 20479. & below, Peri-Pro II (91000) serial # 20480 & above. Air Techniques part # 90223. American Dental part # AT-31. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Other Healthcare, Lab & Dental".The seller is "vividmedicalsource" and is located in this country: US. This item can be shipped worldwide.