Our round umbrella pole holder is a stylish umbrella base that can easily fill with water or sand, adding all the support your patio umbrella need. Constructed of heavy-duty metal and HDPE material, this patio umbrella base is highly durable to withstand a range of climates. It comes with 2 interchangeable sizing inserts on the top of steel pipe fit 1.5" to 1.9"(38mm to 48 mm) diameter umbrella poles. The knobs are designed for convenient operation to tighten the poles to fix your umbrella of 270-300 cm(9-10 ft)firmly. It is decorative with an attractive appearance for outdoor use on patios, pools, gardens, decks, porches, etc.