Pelletized Carbon 55 Lbs. Bag [GC 4x8B]Pelletized Activated Carbon GC C 40 is a virgin activated carbon. Derived from the finest grades of low ash coal, it is pelletized in form. Its high activity and surface area make it ideal for most vapor phase applications. The uniformity of its shape makes it particularly attractive in applications where low pressure drop is a consideration. Specifications Particle Size (Diameter), mm: 3. 9 4. 1 Mean Particle Diameter, mm: 4. 0 CCl4 Activity, %: 60