Patio umbrella base with perfect compatibility!Our 20" x 20" steel base comes with 4 non-slip pads to keep the patio umbrella stable on uneven grounds. And it weights up to 35 LBS for higher stability. It is constructed of powder coated steel, which is waterproof, rust-proof and anti-fading. Hence, the dust and stains on the surface can be easily removed with a wet cloth. The package comes with 2 adapters of different diameters, allowing umbrellas poles from 1.6 "to 1.9" in diameter to be inserted onto the umbrella base. Tighten the knob on the steel tube, and you can secure the umbrella within the range to the base without shaking. Designed in elegant style, it can perfectly decor your leisure space with your patio umbrella. Color: Black. Material: Metal.