Welded solid steel frame with adjustable shelves in 1/2 inch increments. All shelves are isolated via 30-50 duro rubber disks depending upon the weight supported. On rollers so whole rack can be rolled out for easy hookup of components.
Thanks for the compliment. I've had several inquiries about folks wanting one made. I might be open to the idea, it can certainly be customized. I built mine because I wanted a couple of drawers and nobody made one to my liking, so, I made my own!