Cat® Heavy Duty Overhead Shelving. With weight capacities of up to 600lbs, these shelves will stand up to anything you can stack on them. Available in 3 configurations with varying dimensions 4′, 6′, 8′ lengths. The Hammered Granite powder coating is durable, scratch/chip resistant, and provides a unique textured finish. Adjust the shelf height from 23″-38″ for a customized fit in your garage, shed, or shop.