Description AGM Part Number Grade/Angstrom Size/Description 920410 4A Blue Indicating 4 x 8 mesh 920406 4A Blue Indicating 8 x 12 mesh Blue Indicating Molecular Sieve is indicating and will change color when the desiccant beads are saturated. Molecular sieve is a synthetically crystalline metal alumosilicate zeolite. Molecular sieve particles have a uniform pore structure that enables molecular sieve to separate molecules by size. This pore structure provides a high capacity for water absorption at very low humidity levels while allowing molecular sieve to retain a higher percentage of moisture capacity at elevated temperatures. Due to its high affinity for moisture, molecular sieve is able to bring the relative humidity in packages down in the low parts per million (ppm) range. AGM's Blue Indicating Molecular Sieve is available in two mesh sizes: 8x12 and 4x8. To determine the best size for your application, please refer to our Mesh Size Equivalents Chart.
