Product Includes: 2 sets (6pcs) outdoor patio deck base replacement parts, including 1.5 inch 1.5 inch umbrella hole ring and 1.9 inch 1.9 inch umbrella hole ring (can be assembled together), 2 pcs 40mm M8 threaded screw. Multiple combination can meet most pole diameter needs, great for stabilizing and aligning patio umbrella bases. Product Size: 1.5 inch and 1.9 inch outdoor umbrella ring, meet most umbrella pole diameter needs, the matching size will be 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 corrosion resistance. weatherproof, they are durable. With good fastening performance, the replacement screws of the thread are made of premium black plastic and stainless steel, sturdy and not easy to break. Easy to install: Choose 2 sizes of the umbrella rings according to the diameters of the umbrella poles, insert the umbrella pole into the base, then tighten the screws of the M8 thread and fix the umbrella to prevent its slipping. For the detail installation steps, please refer to the installed teaching picture. Wide application: These eyelets meet standard pole diameters on the market; the classic black color can match all your outdoor furniture and allow more space. Can be used on the patio table, beach, backdrop, garden, balcony, deck and poolside.