These posts are constructed of durable, corrosion-proof polymer and have adjustable leveling feet to securely hold shelves on even the most unlevel floors. Built-in Microban antimicrobial protects against bacteria, mold, mildew, and fungus that causes product degradation. Robust polymer construction resists moisture, chemicals, and harsh environments Microban antimicrobial stops bacteria, mold, mildew, and fungus growth Numbered and grooved every 1" for easy shelf placement and adjustment Leveling foot adjusts up to 1" NSF certified for all environments Lifetime warranty against rust and corrosion Shipping: 5 business days, based on availability