INAX Elevated Toilet Seat ◯ Warm water bidet (Washlet) with SIAA mark The SIAA mark is an antibacterial symbol mark established by the Society of International Antimicrobial Articles, and is displayed on products that meet the three criteria of antibacterial properties, safety, and proper labeling. ◯ Used for about half a year ◯ Home cleaned and alcohol disinfected (cleaned with toilet cleaner and disinfected) ◯ I believe it is compatible and suitable for the toilet bowl itself. ◯ Item ④ was purchased in case it wasn't compatible, but it is unused. ◯ The inner, directly-touching splash guard seat is in good condition. There are two areas on the base where there are scuff marks from installation, but they are not visible as the splash guard covers them. Some adhesive-like substance is attached to the underside. Please check beforehand and consider purchasing. ※