Metal-free brushes are preferred for pharmaceutical cleaning applications due to their reduced risk of contamination and improved safety. Metal components can react with cleaning solutions, corrode, or shed fibers, leading to potential contamination of products. Metal-free brushes are mono-material, made entirely of polypropylene, with no adhesives. They are compatible with cleaning solutions and do not pose the same risk of contamination as traditional brushes. Additionally, they are often easier to decontaminate, reducing the risk of residual contamination. This method of construction is unique to Braun Brush as they are the creators of metal free tube brushes.