... strength Good quality & completive price Widely used in the exploration of oil & gas wells Ceramic proppant is the key material in low-permeability ... respectively: 12-20 mesh, 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 40-60 mesh, 40-70 mesh, 70 ... .)Contact:bob at hnkingway dot comHenan Kingway Chemicals Co., Ltd. Ceramic proppant in oil field