Cove 1/4" Frameless Pivot Shower Door, 1/4? tempered safety glass, An anodized aluminum frame in a selection of stylish finishes, Through the glass knob, Up to 1/2? adjustment for out of square walls. Doors are backed by a Limited Lifetime Warranty, H2OFF clean glass technology is applied to the inside surface of the glass. Backed by a 10-Year Warranty, H2OFF keeps glass looking like new.