3-1/8" (79 mm) threshold;Easy-to-clean, durable high-gloss finish;Three-piece tongue-and-groove walls with snap-together installation;Modular design allows it to be moved around corners and through doorways with ease;Curved wall design for a smooth look and feel;Convenient shelves provide generous storage space;Shaving ledge/footrest for added comfort;Factory-installed Aging in Place backerboards for future grab bar installation