Our Galvanized Powder Coating Square Tube Q235b for umbrella is perfect for providing strong support and stability for your outdoor umbrellas. Made from high-quality Q235b steel and galvanized with a strong powder coating, these square tubes are durable, rust-resistant, and suitable for use in all kinds of weather conditions. We are a factory that specializes in creating weather-resistant, long-lasting outdoor products, and this square tube is no exception. If you're looking for a sturdy and reliable way to support your patio or beach umbrellas, our Galvanized Powder Coating Square Tube Q235b is the perfect choice.