... proppant used for?Ceramic proppant are the indispensable materials used in acid fracturing and hydraulic fracturing of new and existing natural gas and oil wells ... , 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 30-60 mesh, 40-60 mesh, 40-70 mesh ... Waihuan Road, CBD Zhengzhou, Henan, ChinaNo.08 hydraulic frac sand for oil and gas 30/50 low density