International Orange windsock (18″ mouth x 5′0″ length x 8″ tail). The windsock is made of premium, durable nylon which is treated with a water repellent and a UV inhibitor. Nylon is the best material for making the windsock responsive to all wind conditions. The size of the windsock is determined by the diameter of the windsock frame and the desired length. Evenly spaced brass grommets allow for the windsock to be attached to the windsock frame with tie wraps. BDS provides black tie wraps with every order. The windsock is FAA approved and meets or exceeds FAA specifications for wind cone assemblies Advisory Circular 150/5345-27D.