Pro 5 Plus Exec CarbonAllerAir Exec Carbon Replacement Filter 3" Depth The Exec Carbon Replacement Filter is designed for general purpose air purification in AllerAir air purifiers, offering reliable protection against a wide range of airborne contaminants. Built with a 3 inch deep activated carbon bed weighing approximately 18 lbs Provides an impressive 2,250 acres of carbon media surface area for maximum adsorption capacity Purpose: General air filtration for homes,