The OEM Bankers Box modular cube shells provide easy access to your letter/legal file boxes during temporary storage or short-term projects. Designed to eliminate the need for stacking, you can simply slide boxes into the extra-strength modular shell featuring a steel support frame. These durable shells fit in various spaces and can stack five units high to optimize floor space. They are designed for stability with wire frames that clip together both vertically and horizontally, and they include Quick Setup assembly for convenience.