Your umbrella won't budge when it's anchored by the sturdy Phat Tommy 75 lbs. Cast Iron Patio Umbrella Base Stand. As the name states, this reliable foundation is constructed entirely from heavy-duty cast iron. It's weather-ready, available in an all-black finish, and can accommodate both 1.5- and 2.0-in. pole sizes. This is an essential part of any patio, deck, or poolside setup, and at 75 pounds, you know it's not going anywhere - and you'll never need to replace it! Umbrella sold separately.