The nipple can be cleaned. The material of the handpiece made in America is appointed as aero plastic. The sale of this item may be subject to regulation by the U. Food and Drug Administration and state and local regulatory agencies.FDA for Curing Light: 510(K) Number: K192233, Regulation Number: 21 CFR 872.6070, Product Code: EBZ. FDA for Handpiece: 510(K) Number: K181691, Regulation Number: 872.4200, Classification Product Code: EFB, Subsequent Product Code: EGS. FDA for Scaler: 510(K) Number: K163414, Regulation Number: 872.4850, Product Code: ELC. This item is in the category "Business & Industrial\Healthcare, Lab & Dental\Handpieces & Instruments\Ultrasonic Scalers". The seller is "jinlan226" and is located in this country: US. This item can be shipped worldwide.