SAP for agriculture, super absorbent polymer, water retain agent 1.Non-toxic,odorless,reusable, ... biological. 2.for garden, pots SAP for agriculture purpose, super absorbent polymer, water retain agent:can swell hundreds of times ... study"for details) Packing:100g/PET bottle, 250g/PET bottle, 100g/hard box, 500g/barrel, 1KG/PET bottle, etc20kg/brown paper bag25kg/brown ...