Product Includes: 12 pcs umbrella replacement parts, including 2 sets (6 pcs) umbrella hole ring in 3 sizes: 1.9 inch, 1.5 inch and 1.3 inch inner diameter (can be assembled together), 4 pcs 40 mm/157 inch m8 hand knob tightening screw and 2 pcs Perfect for stabilizing and aligning patio umbrella bases. Product Size: 1.9 inch, 1.5 inch and 1.3 inch outer umbrella ring, meets the needs of most umbrella poles, the assorted size is great for tightening the umbrella pole, can protect your umbrella from scratches and dents on the umbrella pole. 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, durable. With good fastening performance, the threaded replacement screws are made of premium plastic and stainless steel, sturdy and not easy to break. Easy to Install: Choose 3 sizes of the umbrella rings according to the diameter of the umbrella poles, insert the umbrella pole into the base, then tighten the M8 Star hand knob and fix the umbrella to prevent it from slipping. Wide Application: These eyelets meet most standard pole diameters on the market; Classic black color can match all your outdoor furniture and provide more space. Can be used on patio tables, beach, yard, garden, balcony, deck and pool.