Very High Purity 99.99% Nano Silver Powder with the size 20 nm-50nm to kill virus
Very High Purity 99.99% Nano Silver Powder with the size 20 nm-50nm to kill virus, US $ 1.2 - 2 / Gram, Solid, 7440-22-4, Silver Metal.Source from BUBEN VIETNAM COMPANY LIMITED on Waimaotong.com.