The water bag is an ideal and convenient way to add additional weight to the flag. It is perfect for both indoor and outdoor use. Easy to transport and setup, simply fill it with water and it will be ready to use in minutes. 
Product Detail: 
Product Diameter: 19" outside, 5" inside (inflated with water)
Height: 2.5"
Weight: 23 lbs (with water)
Compatible with: Cross Base, Square Base, and Carrying Bag