Proform Wire Shelving Starter Units are green in color. Combine our Proform Wire Shelving Add-On Units to your Proform Wire Shelving Starter Unit for more storage space at a economical price. Epoxy coated for the durability and strength you need. Proform is great for high humidity applications. The carbon steel is treated with an iron phosphate base. A hybrid epoxy with an antibacterial agent is electrostatically applied over the treated surface.