1.Specification: 15-15-15,16-16-16,16-8-18,25-7-8,20-9-11. 2.Moisture:2%max ... INSPECTION & ISO CERTIFICATE High Quality NPK Compoud Fertilizer(We can compound any purity of NPK you requested)1.Specification: 15-15-15 ... ,16-16-16,16-8-18,25-7-8,20-9-11. 2 ... 90%min40%28-12-0granular size2-4mm, 90% min40%20-20-0granular size2-4mm, 90%min42%16-8-18granular size2-4mm ...