Walmart offers Plano 4-tier heavy-duty plastic shelves on sale. With only $14.97, you can get this $34.32 value shelves with no code needed. Shipping is not available for this order. You can pick it up in store for free. Store your favorite knick-knacks and other personal items with the Plano 4-Tier Heavy-Duty White Plastic Shelves. This unit is made of durable, impact- and rust-resistant plastic that can be used to store just about anything. You can use it to hold your kid's art supplies or your gardening tools. You can also use it to place your grill outdoors.