low density ceramic proppants of 20/40 1.passed ISO9001 2.widely used in exploiting oil and gas 3,hot sell ... , 16-20 mesh, 16-30 mesh, 20-40 mesh, 30-50 mesh, 40-60 mesh, 40-70 mesh, 70-100 mesh, etc. GMRC ... .30%0.00%Sieve+30 mesh-30 + 35 mesh-35 + 40 mesh-40 + 45 mesh-45 + 50 mesh-50 meshWt.% Retained4.20 ... %70.10%24.70%1.00%0.00%0.00%Median Particle ...