Solid Brass Material Fits 1/4" to 1/2" Thick Glass Without Protective Plastic Sleeve Cylinder Style Knob adds a simple elegance to a frameless shower enclosure. The sleek, cylindrical shape is functional without detracting from the beauty of an all glass door. Knob diameter is 3/4 inch (19 millimeter), and it stands 1-1/4 inches (31.75 millimeters) from the glass surface. The end cap for the single-sided model stands only 5/32 inch (4 millimeter) from the glass surface. Color: Satin Brass Hole Diameter Required: 3/8 or 1/2 in (10 or 12 mm) Minimum Order: 1 Each