Particle size distribution :10/20m 20/50m 30/50m 50/100m 100m 200 m 325m P2o5 : 0.0002% Cao : 0.01% Mgo: 0.01% Al2o3: 0.15% Fe2o3: 0.005% Sio2 : 99.9% Packaging: 25 kg / bag, 1000 kg / bag , 20-24mt/1x20container . We can offer free sample from 5kgs to 25kgs.