Plastic umbrella base plate set(4 triangular pieces for 1 set), in Black, Sturdy, Lightweight, Convenient Can be filled with water so that plates provide additional weight required to improve umbrella stability in windy conditions Each plate can be filled with 15-18 lb of water. The whole base provides approximately 70 lb weight when filled with water Made of durable plastic; The cross base and stand in the picture is only for display Perfect for all domi outdoor living offset umbrella. Sturdy enough for home and commercial use; Brings nature and beauty into your garden or home