Blank Orange Airport Windsocks, 36x144 inch are made from 200D Nylon (1665c) and double stitched all around with reinforced ends. They have a nylon header and 10 brass grommets. This FAA Size 2 Airport Windsock (12 feet in length and 36 inches in throat diameter) is appropriate for use with L-807 assemblies. Our 1 ply Airport Windsocks are typically used at airports and chemical plants as indicators of wind speed and wind direction. Our durable airport windsocks are easily visible and are ideal for commercial or private use.