8″ Silver Inline GAC Cartridge. Suits: Fridge Filters or Tank Water. Includes: 1/4″ fittings. Size: 8″ Contains: SILVER carbon. Coconut Carbon is rated to be one of the best base materials used in today’s market. Coconut Carbon provides a much higher volume of microspores than coal, wood or lignite based carbon. Thus, resulting in a more effective removal of trihalomethanes (THM’s) from municipal water supplies. The larger surface area provides a more effective method of filtering common contaminates such as chlorine & chloramines.