Portable Rack's base is powder coated and the post is hot-dip zinc which prevents rust and is more durable. Portable Rack is a simple way to stack products safely. Most product stored on wooden pallets is unable to stack due to the weights involved. This stacking rack can load up to 1000kg and can stack up to 4 layers high. When not in use, and by removing the post, the bases can be stacked on top of each other to save space.