Thick wall carbon construction for superior performance^Top-of-the-line coconut shell Carbon Block filter cartridge for chlorine taste, odor and sediment suction.^^Features ; Superior chlorine reduction ; Low-pressure drop ; Will not channel ; Cost savings ; 100% coconut shell carbon ; FDA grade components and materials ; Solid Block Activated Carbon for long life^^Temperature ; Operating temperature: 40°F to 165°F (4.4°C to 73.8°C)^^Specifications: ; Type: Thick Wall ; OD: 4-5/8” (117 mm) ; Length: 9-3/4” (248 mm) ; Micron Rating: 5 nominal ; Flow Rate: 4 gpm