Hyper Tough 3 Tier Multi-Purpose Stack- able Wire Shelving Rack is perfect for kitchen, bath, dorm and office use. Wherever you need additional space, these inexpensive easy to assemble and durable wire shelving units are there for you. You can purchase 4 pcs 3/4" pole connectors (#4PC34P-10) to assemble 2 units as a 6 tier shelving unit.