RaceQuip Window Net are constructed of heavy-duty 1″ polypropylene webbing and nylon thread for maximum durability. Jig-built construction techniques ensure consistent size, shape, and fit. Available in black, red, blue, yellow, orange, purple, platinum, and green. The standard size is 18″x24″ which will fit most window openings. Exceeds SFI 27.1 Rating (Dated SFI Tag Affixed).