Our rotational molded infant swing seat made of polypropylene. The seat meets ASTM standards for commercial use in school and park playgrounds. The extra wide hanger is especially designed so that the seat is gravitationally correct when a child is swinging in the seat. The hanger is made of stainless steel. The dimensions are: 12" across, 11.5" front to back, leg holes 6.5" diameter, seat is 8" deep. Available in black, red, blue, yellow, and green.