Each preassembled rite-size and emperor cartridge has a patented ribbed back that evenly distributes carbon for maximum wate. No bypass, no tea bag effect. Highest grade magnum carbon removes more pollutants. 100% More Carbon. Larger Polyfiber Filter Pad. The Emperor Filter Systems, Our Heavy Duty Emperor Filter Cartridge Delivers Two Full Ounces Of Activated Carbon Filtration And 45% More Mechanical Filter Area. Larger Polyfiber Filter Pads Traps More Di 3 PACK