Golf Cart Umbrella Holder NEW and IMPROVED Umbrella Holder: Material - High Strength Plastic, Length - 13 1/2 inches, Inside Diameter - 1 3/4 inch, Large 2 1/2 inch Thumb Screw, Light Weight 13.2 oz. Fits Golf and Travel size UV-Blocker umbrellas (umbrella not included) Cart Mount: Color  Black, Material - Powder Coated Marine Grade Aluminum, Stud - 1/4 inch 20 thread, Ball Size - 1 1/2 inch, Weight 3.6 oz.