Add this step shelf for 2 additional rows and save space. This is a perfect addition to your collection, allowing you to maximize your space and feature all of your collectibles. This step shelf slides in perfectly with 2 steps and enough room on the bottom lip to hold another row of collectibles. Each 4 foot section fits perfectly in our 4.5" (Series 3000) Display Cases. Perfect for O Scale Train Displays and Diecast Cars in 1:43 or 1:24 scale.