RaceQuip® Ribbon Window Nets are constructed of heavy-duty 1 inch polypropylene webbing and nylon thread for maximum durability. RaceQuip® utilizes jig-built construction techniques which ensure consistent size, shape, and fit. Available in a variety of colors. This window net size is 18 inches High X 24 inches Wide which is standard and will fit most window openings. Exceeds SFI 27.1 safety specifications.