... strength, conductivity and strong, and corrosion resistance, etc., is the exploitation of oil natural gas fracturing indispensable good helper 3.Advantage : ... 103 Mpa (15000 psi) 2.Bulk Density : Low Density ; Middle Density and High Density.Cover 0.425-0.85 mm,0. ... : color:yellow,dark grey,black SpecificationBulk Density(g/cm3)Apparent Density(g/cm3)Close Pressure(Mpa)Crush Resistance(%)Sphericity ...