Heavy Duty Construction Crafted from High-Density HDPE Plastic Fits Most Market Umbrellas from 6.5 to 8 FT Includes Three PVC Sleeves (1-1/4', 1-1/2', 1-9/10') for Different Pole Sizes Base is Fillable with 64 Lbs. of Sand or 50 Lbs. Water 20 x 20 x 6.5 Base Features 360° Rotation and Effortless Movement