Solid Brass MaterialFits 1/4" to 1/2" (6 to 12 mm) Thick GlassWithout Protective Plastic SleeveOur CRL Cylinder Style Knob adds a simple elegance to a frameless shower enclosure. The new Plastic Sleeve Model is ideal for use on sliding bypass shower doors to protect the knob surface. 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 (32 millimeters) from the glass surface. The end cap for the single-sided model stands only 5/32 inch (4 millimeter) from the glass surface. Stocked in several beautiful finishes, with custom finishes available on request.