CTO10  OD:2.5" 

 Our  CTO also have other sizes.  such  as  10"BB,  20", 20"BB, 30", 40".

It ash content is controlled to be the lowest to retain more effective micro-pores.  The large surface area has a tremendous capacity to absorb Chlorine, unpleasant odor, color, spore, and remove Lead and microorganisms.  The coconut shell activated carbon filter cartridge has a better filtration effect to the chemicals such as Trihalomethanes(THM'S).