This patio umbrella base includes 4 interconnecting plates secured with metal pins, providing stable support for 9-10 ft offset hanging umbrellas and 8 ft cantilever umbrellas. Fill all 4 plates with mixed sand and water for a total weight up to 164 lbs. keeping your umbrella steady even on breezy patios. Each plate features wide spouts and leak-proof twist caps for quick filling-add 33 lbs. of water, 38 lbs. of sand, or up to 18 lbs. of sand-water mix per plate. Draining is just as fast for off-season storage. Crafted from premium HDPE material, this base resists sun, rain, fading, cracking, and warping. Each plate has a grooved handle for easy lifting, and plates stack to 12 in. high for compact storage. No tools required for assembly. Color: Black. Material: PVC.