This high quality luxurious semi-frameless sliding shower door shower enclosure features a deluxe quality roller bracket and superior bottom guiding system. The glass is a full 1/4” thick rather than the 3/16” glass that you normally find in these types of shower enclosures. The metal is a heavy aluminum extrusion, not the thin flimsy type you find at Home Depot. The towel bars are the European style brass “through glass” type that really make a difference in the overall look. This enclosure is a great value for the money!