Top ceramic proppant 40/70 low density high pressure resistance, high conductivity, ... materials used in acid fracturing and hydraulic fracturing of new and existing natural gas and oil wells, which can ... mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 30-60 mesh, 40-60 mesh, 40-70 mesh, 70-140 mesh ... .25 Shangwu Waihuan Road, CBD Zhengzhou, Henan, ChinaNo.08 new frac sand for shale gas 40/70 low density