The Aqua-Pure™ AP110 filter cartridge provides fine sediment filtration down to five microns, producing cleaner and clearer drinking water. The fine sediment filtration also helps to eliminate sediment unloading caused by variances in water pressure throughout your home. The filter's grooved surface increases total surface area, leading to a longer cartridge lifeProduct Benefits:Patent pending technology provides fine sediment filtration down to 5 micronGrooved cartridge increases surface area for longer cartridge life, by 132% over non-grooved and 47% over the previous designRigid construction helps to eliminate sediment “unloading” due to variances in water pressure