This is the hard base weight that can be perfectly fixed. Made of durable PE material and excellent blow molding technology it can ensure weather resistance and lasting quality. Â Four plates are connected by 4 galvanized pins and the sturdy 4-plate structure is very easy to disassemble and store. Most importantly you can fill it with sand and water to ensure the stability of the umbrella. Also the easy-to-fill large 1.5-inch water injection spouts can help you fill quickly without wasting time.