Keep your umbrella securely intact without sacrificing style with the MiYu Furniture 18 in. Square Stainless Steel Umbrella base. Crafted from durable stainless steel and filled with concrete, this strong and secure 55 lb. base accommodates any umbrella. Its unique, adjustable tightening knob helps you to easily secure almost any size umbrella so you don’t have to worry about it blowing away.