4PCS Patio Umbrella Base Weight (Triangular 33"X33")Description This is our hard base weightthat can be perfectly fixed. Made of durable PE material and excellent blowmolding technology, it can ensure weather resistance and lasting quality. Fourplates are connected by 4 galvanized pins, and the sturdy 4 plate structure isvery easy to disassemble and store. Most importantly, you can fill it with sandand water to ensure the stability of the umbrella. Also, the easy to fill large1. 5 inch water injection