low cost proppant 20/40 mesh 1.Passed ISO & API 2.Tested by ... mesh, 8-16 mesh, 12-18 mesh, 12-20 mesh, 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 30-60 mesh, 40-60 mesh, 40-70 mesh, 70-140 mesh ... , etc.Moreover, we can produce proppants with different specifications according to your particular requirement.In ... NO.4 low cost proppant 20/40 mesh