These frames are one of our most popular among aviation enthusiasts as well as general aviation professionals. Manufactured from ¼” cold rolled steel and designed for many years of service. The frames are zinc plated for a long-lasting, chrome-like finish. A machined bearing is added that allows the windsock to respond to the slightest wind. All you need for installation is a ½” collar looking up from your mast. We have four sizes to choose from – 6”, 10”, and 13” diameters.