... .size 2-4mm,90%min We produce all kinds of NPK compound fertilizers and the following products are very popular: Active ... -4mm, 90%min40%28-12-0granular size2-4mm, 90% min40%20-20-0granular size2-4mm, 90%min42%16-8-18granular size2-4mm ... -4mm, 90%min48%16-16-16granular size2-4mm, 90%min NPK fertilizers