RaceQuip Ribbon Window Nets are constructed of heavy-duty 1" polypropylene webbing and nylon thread for maximum durability. For over a decade, RaceQuip has utilized jig-built construction techniques which ensure consistent size, shape, and fit. Available in black, red, blue, yellow, orange and purple. This window net size is 18" High X 24" Wide which is standard and will fit most window openings. Five new unique sizes are also now also available. See chart for sizes. Exceeds SFI 27.1 specifications.