cto carbon block 
The block carbon filter cartridge is compression or extruded by high quality activated carbon.
Usually,it can be made of the various carbon media.such as:coal carbon,fruit shell carbon
and coconut carbon.
The CTO filter cartridge is suitable for the water treatment for removing the chorine,taste,and odor.
Filtration precision :5,10,20micron.
Length:5,10,20inch
Out diameter:2.5,4.5inch.