In-wall bidet carrier can be ordered from Geberit (article # 111.520.00.1). Incl. fastening set for concealed mounting system. This wall-mounted bidet is made of vitreous china. The wall-mounted bidet is 23 5/8" x 14 5/8". The product is with overflow. The product is with ceramic plus. The wall-mounted bidet is Villeroy & Boch model 7441U0.. meets and exceeds ASME A112.19.2/CSA B45.1 ASME A112.19.14, Code Compliance: UPC, IPC, NSPC, NPC Canada and others. one year limited warranty. waste diameter: 1 1/4" O.D.