BaSO4:Min90%, Density: 4.0-4.2. Whiteness: min 85%. Moisture: 0.2% Max. SiO2 Content max: 2% Fe2O3 Content max: 0.04% Origin: Shaanxi Province Supply Quantity: Min 5,000 MT/month Size: 20-50mm.Lump Loading Port: Xing Gang Port & Liang Yun Gang Port. Price: Competitive Price n the market.