The Alliance Pro LT collection by DreamLine is a budget-friendly semi-frameless sliding bypass shower or tub door featuring a super sleek headrail for a modern design that will complement a variety of bathroom styles. They offer unparalleled value with ¼ in certified clear tempered glass, smooth gliding rollers, and an integrated towel bar for convenience. Important! All measurements should be taken only after walls are finished (tile, back walls, etc.). Drilling into the threshold is optional for the installation of this product. This product is not available with ClearMax protective glass coating. Premium product upgrade: DreamLine cavalier shower door with 5/16 in. Certified tempered glass, clear max protective glass coating, and premium rollers and hardware.