1.factory price direct sell 2.free sample 3.with certification 4.high quality and reasonable ... Weight (Da)≤5000,3000,2000,1000Degree of polymerization, DP2-30, 2-18, 2-12, 2-6Deacetylation ,( DAC),(%)≥90Particle(Mesh)≥100Moisture (%)≤10.0Ash Content (%)≤1 ...