P/N 33091-02 Refillable Carbon Module
This is a permanent module that you fill with bulk carbon. The carbon can be changed by dumping it out and re-filling.
This carbon module is standard on all NEW SC-150 models and you DO NOT NEED TO PURCHASE it. If you have on older version of the SC-150 and are ordering the P1992, you will need to purchase this item ONCE. Bulk carbon can be purchased here.