Product Description: Quantity: 6pcs Color: black Package Includes: this set of patio umbrella base parts include 2 pieces umbrella hole base with an inner diameter of 1.9 inches, 2 umbrella hole base with an inner diameter of 1.5 inches, 2 classic M8 40 mm threaded replacement screws; A rich number and combination of styles to meet your umbrella parts replacement needs Good Workmanship: the umbrella stand replacement part is main made of HDPE plastic, wear resistant and extrusion resistant, with high temperature and weather resistance characteristics, threaded replacement screw is made of quality black plastic and stainless steel, good fastening performance; Not easy to corrosion Good Wind Stability: 1.5 inches and 1.9 inches 2 sizes of outdoor umbrella ring, to meet most of the umbrella pole diameter needs, matching the size will be excellent tightening umbrella pole; Effectively reduce the wind caused by the umbrella shaking; Also can protect your umbrella to avoid friction on the umbrella pole scratches and dents Easy to Install: you can choose 2 sizes of umbrella hole covers according to your different diameter umbrella pole, put them together tightly to keep the umbrella stable; Tighten the M8 40 mm thread to replace the handle after installation, adjust the knob to fix to avoid the umbrella from slipping Wide Range of Applicability: these umbrella hole ring plugs conform to market standard umbrella base pole diameters; Pole adapters can be installed in most umbrellas for more options in outdoor spaces, such as beaches, backyards, balconies and poolside