These vented polymer shelves panels easily remove from frame for cleaning either by hand or in dishwasher. Made from a plastic that contains a SaniGuard™ anti-microbial protection to help protect against growth of stains and bacteria. Vented polymer shelves have a wire frame are green epoxy coated heavy duty steel. When weight is distributed evenly, each shelf will hold up to 600 pounds. Vented polymer shelves are suitable for all environments and will not corrode or rust.