This umbrella base is made to securely hold the Cantilever umbrellas from Hanover?s Outdoor Furniture line. The product is made out of plastic with a hollow interior. Set-up is easy simply choose the location of where you want your Cantilever and fill the base up with water to support the weight and angle of the umbrella. Make sure the base is set in the exact location of where you want the umbrella displayed prior to filling it up. Filling the base with wet sand provides the best support for heavier umbrellas however it is not recommended for those who wish to frequently relocate the Cantilever as it becomes much heavier to move and more difficult to empty.