Product Details This 26 lb. umbrella base is an affordable way to securely hold your umbrella and keep it upright. Dependable and sturdy, this rust-resistant concrete and resin base is reliable and sturdy, and fits most market umbrellas with stems between 1 3/8″ and 2″ long, and includes knobs that tighten to adjust according to stem size. Designed for use with tables, not for freestanding umbrellas. Durable 6. Steel Umbrella Base with Two Tightening Knobs Base must be used with a table; not for freestanding umbrellas Rust-resistant powder-coated black finish matches most patio table sets Assembly Required More Details Features Rust-resistant Colors Black Assembled Product Weight 22 lbs Material Steel Assembled Product Dimensions (L x W x H) 17.00 x 17.00 x 13.00 in