1.Specification: 15-15-15,16-16-16,16-8-18,25-7-8,20 ... 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 ... -4mm, 90%min43%16-6-21granular size2-4mm, 90%min45%15-15-15granular size2-4mm, 90%min45%19-7-19granular size2-4mm ... -4mm, 90%min48%16-16-16granular size2-4mm, 90%min HIGH QUALITY NPK FERTILIZER FACTORY