MetroMax Polymer Mobile Posts are made to be used with stem casters to turn your MetroMax i or Q shelving unit into the perfect cart. Simply accepts stem casters for convenient mobility 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 NSF certified for all environments Lifetime warranty against rust and corrosion Shipping: 9"h 30 business days, based on availability Shipping: 13-86"h 5 business days, based on availability Returns: View our return policy.