... (Low,Middle,High Density) 1.Size:20/40,30/50,40/70 Mesh 2.High Fracture Conductivity 3.Oil, ... High Density.Cover 0.425-0.85 mm,0.212-0.425 mm,0.3-0.6 mm etc. 3.Specification (Size) : 20/40 mesh ; 30 ... /50 mesh ; 40/70 ... 1.83.1-3.469≤5.0>0.85Low Density20/40mesh<1.65≤3.152≤8.0>0.85 5.Application : Fracturing proppant ...