3/4″ (19 mm) Diameter Heavy Brass Tubing (1.5 mil Thick) Fits 1/4″ to 1/2″ (6 to 12 mm) Thick Glass Our CRL Brass Back-to-Back Towel Bars for Glass are constructed of 1.5 mil thick brass tubing. Available in three sizes and nine popular finishes. Color: Oil Rub Bronze Minimum Order: 1 Each Additional Product Information: Specifications: Material: 3/4 inch (19 millimeter) Diameter Heavy Brass Tubing (1.5 mil thick) This Package Includes Two Each Towel Bars Four Each 1-1/4 inch (31.8 millimeter) Diameter Metal Washers and Plastic Washers Fits Glass Thickness: 1/4 to 1/2 inch (6 to 12 millimeter) Hole Diameter Required: 1/2 inch (12 millimeter)