Imagine purchasing an automobile that wasn't painted! That is often what you are doing when you buy air amplifiers, air knives and air wipes, and air conveyors from the competition! All Min Shang distributed Air Blade air knives, Ring Blade air wipes and Ring Vac air conveyors are anodized to hold up to the industrial environments to which these products are often subjected. Do not be "talked into" buying stainless steel when anodized aluminum is lighter, often just as effective for most applications and lower in price. Stainless steel is supplied when necessary for food and pharmaceutical and high temperature applications when aluminum will not suffice.