The CRL Square Single-Sided Knob is ideal for use with our SQ Series Towel Bars to adapt them into Towel Bar/Knob Combinations. The Knob comes with a 1/4-20 threaded screw that fits most CRL Towel Bars. Knob measures 3/4 x 3/4 x 1-3/16 19 x 19 x 30 mm. Stocked in several popular finishes. Most shipping weights are approximate and have not been verified. If the exact weight is needed in order to determine shipping costs, and shipping costs are required in order for you to complete your order, please request this prior to submitting your order by contacting CRL Customer Service. Product images shown are of the actual product or a close representation. Colors can vary depending on your computer's video card and on how your monitor's color is adjusted.