Product includes: 6 pieces umbrella stand, including 3 umbrella hole rings and 1 oblique mouth umbrella stand pipe, 2 M8 star hand tightening screws. Ideal for stabilizing and aligning patio umbrella bases. Product size: The umbrella hole rings have 3 sizes: 1.9 inches, 1.5 inches and 1.3 inches in inner diameter (maybe have been assembled together), the M8 star hand knob tightening screw is 20 mm/0.79 inches long, fits Most umbrella pole diameters, the corresponding size will be excellent for tightening the umbrella pole, can better protect your outdoor umbrella. Premium Material: The umbrella base accessories are made of high quality plastic, sturdy and durable. With good extrusion resistance, high temperature resistance and weather resistance. With good fastening performance, the replacement screws are made of premium plastic and stainless steel, sturdy and not easy to break. Easy to Install: Use the umbrella rings according to the diameters of the umbrella poles, insert the