Absorbing tin, lead, is harmful for our healthy .it can attract them efficiency. 1. Absorbing tin, lead, is harmful for our healthy .it can attract them efficiency.2. It's easy for movement, compact structure.3. White and black color for you choose, white is C-493, and black is C-493A(antistatic).4. Activated carbon filter can change for a new one.5. Adopting axis can get stable speed, little ...