They come in vacuum-sealed packages of two. This is a dental-exclusive, dental-only Invisalign Chewie, equivalent to 4 cases, with 4 packages containing 8 pieces. New arrival! Currently: 8 pieces: 898 yen 16 pieces: 1600 yen [Available to change to Mercari delivery (anonymous) for an additional 50 yen] Remover discount available for addition. #RemoverList If you want to change the contents, please comment first m(_ _)m If there are no changes, you can buy it immediately without commenting! We have many great bundled products (*^^*) For details, please see #FromTheSouthernCountryList ★ This is a Chewie Aligner Tray Seater used to firmly fit aligners and Invisalign, etc., exclusively sold at dental clinics. Pastel colors. We also sell Invisalign removers such as Easy Lift. #OrthodonticsList #ChewiePackageList #ChewieList #DentalSelfCare #AdultList #ChildrenList #SaleList [Product Overview] Aligner Chewie Quantity: 8 pieces Features: Packaged for hygiene Shipping: Regular mail Mouthpiece Orthodontics Pastel Colors Chewie 4 cases Dental Clinic Exclusive Dental Clinic Only Dental Exclusive Dental Only Invisalign Invisalign Chewie Retainer Aligner Chewie #MouthpieceOrthodontics Aligner Remover Invisalign Remover Retainer Case