Light weight, more practical.Excellent abrasive resistance and more durable.Superior small hole construction and high-performance sorption.Large specific surface area and high adsorption capacity.Adsorb particulate faster and more effectively than other carbon.950 high iodine adsorption value, much stronger adsorbing ability.Iodine adsorption value is a performance parameter of activated carbon.The higher iodine adsorption value, the stronger adsorbing ability.With the same iodine value, the filtering effect of coconut shell active carbon is the best.53% open hole area by professional design to allow more air flow to get through.Safe and environmental friendly.Features:6" flange.Coconut shell activated carbon filter.Safe and effective operation.Maintenance free design.Cotton filter pad.Pre-filter included.Two free elastic ropes to fix the filter pad.Specification:Flange 4"Carbon Layer Thickness 1.5 inchesCarbon Norm Coconut Shell Activated CarbonOpen Hole Area 53% (Professional design)Maximum Scrubbing 450CFM(cubic feet per minute)Overall Size: 22" Tall x 10" Bottom DiameterHardness More than 96%Coconut Shell Activated Carbon:Specific Surface Area 900-1000 square meter per gramIodine Adsorption Value 950 (High efficiency)Moisture Content Less than 8%Ash Less than 4%Average Life Expectancy of Carbon 12 to 18 monthsMax. Endurable Temperature 400 degree centigrade (Safer)Operating Environment Temperature -20 to 65 degree centigradePackage Includes:1x 6" Coconut Shell Activated Carbon Air Filter2x Elastic Ropes