Durable carts are designed for high-humidity environments; white PVC plastic frames won't peel, dent, or chip. Also won't rust, stain, or support bacterial growth. Shelves are made of vacuum-formed 3/16" ABS plastic to prevent cracking and eliminate rattling. Shelves are rated at 100 lbs. Colors: Blue, Mauve, Teal, Sand, Wedgewood Blue.