【EFFORTLESS INSTALLATION】: You can choose 1.5 inch or 1.9 inch umbrella rings according to your needs and assemble them tightly to keep the umbrella stable; after installation, tighten the M8 40mm/1.57 inch threaded handle and the adjustment knob is fixed, preventing umbrellas from slipping. 【GOOD WIND RESISTANCE】: The 1.5-inch and 1.9-inch outer umbrella rings can meet the diameter requirements of most umbrella poles, and the corresponding size will be an excellent umbrella pole clamp; effectively reduce wind caused by umbrella shaking; can also protect your umbrella from scratches and dents due to friction from the umbrella shaft. 【PRACTICAL FUNCTION】: These umbrella base weights can help stabilize patio umbrellas, reducing and preventing scratches or dents on unstable umbrella poles. 【HIGH QUALITY】: The umbrella holder replacement parts are mainly made of sturdy PP, resistant to wear and extrusion, the replacement thread screws are made of high quality black PP and stainless steel, with good fixing performance. 【WIDE RANGE OF APPLICATIONS】: You can place the parasol base in outdoor spaces, such as the beach, garden, balcony, and pool, to reduce wind damage caused by the umbrella shaking, protect your umbrella, and prevent scratches and dents on the umbrella pole from friction. Product Description:It helps the umbrella on the table to stand upright without wobbling; no need to worry about tilting or shaking caused by the wind.It can stabilize the parasol and reduce and prevent scratches and dents caused by friction.Keeps the umbrella centered on the table.Exquisite material, no need to worry about quality. Name: Outdoor umbrella base.Material: Polypropylene materialColor: BlackUmbrella hole base: 1.9 inches/1.5 inchesProduct color: blackQuantity: 2 sets