Our solid granite parasol base provides a firm and sturdy base for holding your umbrella and keeping it from tipping over or being blown away. Made of strong granite and with a weight of 66.1 lb, this umbrella weight plate is extremely stable and ensures your parasol stand still even in windy weather. The umbrella holder has 2 locking bolts to keep the umbrella pole in place. One adapter is included, making the parasol base holder suitable for parasol poles with diameters of 1.5"/1.9". Additionally, with 4 castors, the parasol base can be moved freely.• Color: Black• Material: Granite weight plate + stainless steel tube holder• Base dimensions: 17.7" x 17.7" x 2" (L x W x T)• Tube height: 11.6"• Tube external diameter: 2.2"• Tube internal diameter: 1.9"• Weight: 66.1 lb• With an adapter for umbrella poles with a diameter of 1.5"/1.9"• With 4 castors and 2 locking bolts