Sterlitech Silver Membrane 5.0 Micron Sheet (15″ X 15″) Sterlitech 银膜 5.0 微米片材 (15″ X 15″) Sterlitech Silver Membrane 5.0 Micron Sheet (15″ X 15″) Sterlitech 银膜 5.0 微米片材 (15″ X 15″)