From the product description, check product page for current description, price and availability:

• 30″ x 14″ Shelves – Steel construction for heavy-duty multipurpose storage.
• 1500 lbs. Capacity – Each shelf holds up to 300 lbs. in systems assembled leveling feet.
• 1. 5″ Wheels + Leveling Feet – Includes smooth-rolling caster wheels (2 locking) for easy positioning in your kitchen, garage, warehouse, or storage area.
• Plated Steel – Provides necessary corrosion resistance in dry and heated storage environments. Easy to wipe down clean.
• Customizable – Shelves are height adjustable by 1-inch increments; no tools required.