Silicon Manganese: 65/17, 64/14, 55/25, 70/15, or other grade as per your request. We are producing 65/17, 60/14, and special grades like Mn55/Si25, Mn70/Si15, or as per request.65/17 grade:Mn 65%min, Si 17%min, P 0.25%max, S 0.06%max, C 2.0%maxSize: 10-50mm or 10-100mmPackage: 1mt jumbo bag Ferro Silicon Manganese