Giantex 35lbs Patio Umbrella Base, Suitable for 1.6''-1.9'' Umbrella Poles (20'' x 20'')Description: Our 35lbs umbrella stands are made of steel with black powder coating, which is durable and resistant to rust. And the steel base is waterproof for outdoor use and easy cleaning. With two adjusters of different sizes, the base is accommodate for 1. 6'' 1. 9'' umbrella poles. With the help of adjustable knob, your umbrella will stay firmly in place and won't wobble easily to ensure your safety. In addition, the base is equipped with 4 non