The activated carbon which is made from the cocoanut shell , is column granule.It can be made into the filter, matching with the metal frame.

• 活性炭是由椰子壳制成的圆柱状颗粒，吸附能力强，可配合金属框做成过滤器，通用性好，结构坚固可拆卸，方便更换滤材与达到外框重复利用的目的，经济性能高。