Natural manganese dioxide Appearance: black powder Usage: Battery industrial and other industrial. Our company offer kinds of dry battery materials, such as emd, nmd, ammonium chloride, zinc chloride, etc. Product: Natural manganese dioxideSpec.:Purity: 60%min.Fe: 9%max.Moisture: 2%min.Packing: 50kgs net per bag, Quantity: 22/25mt/FCL Pls feel free to contact us if have any questions