Can be filled with sand so that plates provide additional weight required to improve umbrella stability in windy conditions
Plastic umbrella base plate set(4 triangular pieces for 1 set),Sturdy, Lightweight, Convenient
The whole base provides approximately 150 lb weight when filled with sand or 180 lb when filled with wet sand, each plate can be filled with 38 lb - 44 lb of wet sand
The cross base and stand in the picture is only for display
A plastic funnel is included for filling in sand easily with instructions