Particle size and physical property : m3000 m4000 m6000 Packaging: 25 kg / bag, 1000 kg / bag.20-24mt/1x20container . Color :white P2o5 : 0.0002% Cao : 0.01% Mgo : 0.01% Al2o3 : 0.15% Fe2o3 : 0.015% Sio2 :99.5% We can offer free sample from 5kgs to 25kgs.