Product includes: 12pcs umbrella replacement parts, including 2 sets of umbrella hole rings (6pcs) in 3 sizes: 1.9inch, 1.5inch and 1.3inch diameter for indoor use (can be assembled), 4pcs 40mm/157inch M8 hand knob clamp screw and 2pcs. Ideal for stabilizing and aligning patio umbrella stands. Product size: 1.9inch, 1.5inch and 1.3inch outer umbrella ring, meet the needs of most umbrella poles, the appropriate size is great for tightening the umbrella pole, can protect your umbrella from scratches and dents on the umbrella pole. Premium material: The umbrella stand accessories are made of high quality plastic, sturdy and durable, with good extrusion resistance, high temperature resistance and weather resistance, long lasting. With good fastening performance, the thread replacement screws are made of high quality plastic and stainless steel, sturdy and not easy to break. Easy to Install: Choose 3 umbrella ring sizes according to the diameters of the umbrella poles, insert the umbrella