Zhongci High Purity Deodorant Block Filter Adsorption Chemical Air Buy Honeycomb Activated Carbon for Air Purification. High Surface Area: Specific surface area reaches 900-1300 m2/g for superior adsorption. Wide Aperture Options: Available in 1.5mm, 3.5mm, 5mm, and 8mm sizes for various needs. High Iodine Value: Iodine number ranges from 200 to 1000 mg/g for strong adsorption. Versatile Applications: Suitable for air purification, gas phase adsorption, and water treatment.