This 50 lb. umbrella base is filled with cement inside its durable molded resin body. It has an E-Z grip handle, so you can easily move it. It is very important to check the umbrella base weight requirement for your umbrella. Before assembly, decide on the location of the umbrella. Allow ample height to avoid damage to your umbrella during assembly and usage. Choose a location that is level and sturdy. Avoid any sloping or soft ground.