3/4" (19 mm) Diameter Brass Tubing Fits 1/4" to 1/2" (6 to 12 mm) Thick Glass These attractive CRL Pull and Towel Bar Sets come with all the hardware needed for installation. They are constructed of heavy brass tubing. Each set consists of one towel bar and one pull, six metal and 12 nylon washers, and two knobs. Color: Brushed Nickel Minimum Order: 1 Each Additional Product Information: Specifications: Material: 3/4 inch (19 millimeter) Diameter Brass Tubing Fits Glass Thickness: 1/4 to 1/2 inch (6 to 12 millimeter) Hole Diameter Required: 1/2 inch (12 millimeter) Hole Spacing: Six inch (152 millimeter) Pull is Six Inches Center-to-Center 12 Inch (305 millimeter) Pull/Towel Bar Center-to-Center 18 Inch (457 millimeter) Towel Bar Center-to-Center 24 Inch (610 millimeter) Towel Bar Center-to-Center