Yescom 8" Hydroponic Coconut Shell Air Activated Carbon Filter Odor Control Scrubber for Inline Exhaust 8" flange and 600CFM(cubic feet per minute) Overall Size:26" Tall x 11" Bottom Diameter Average Life Expectancy of Carbon: about 1.5 yrs 950 high iodine adsorption value, much stronger adsorbing ability Large specific surface area and high adsorption capacity