Heavy Duty Support: Provides support to windsocks so they can detect the slightest wind changes. Resilient: Crafted from zinc plated, 1/4 inch cold-rolled steel for a long-lasting chrome finish. Wide Size Selection: Choose from 3 different sizes - 6”, 10”, and 13” diameters for all your windsock needs. Multipurpose Use: Used in many places from highways to airports to industrial sites. Easy Installation: Add a 1/2" collar looking up from the mast and you're ready to use.