The Royal Doulton 9 ¾" Ceramic Replacement Cartridge with GAC (AR-900C) is for Counter Top and Under The Sink Model No.: AQ-125, AQ-135, AQ-135F, AQ-135F/AT, AQ-425, AQ-435, AQ-435F, and AQ-435F/AT

Capacity: 50 Cleanings or 2 years, whichever occurs first. 

Efficiency: Royal Doulton Ceramic Replacement Cartridge with GAC (AR-900C) used for the reduction of Parasites, Cysts and Bacteria.

Royal Doulton Ceramic Replacement Cartridge with GAC : AR-900C is a product of Aquaspace Water Systems. For over 20 years, Aquaspace Water Systems has been solving your residential, commercial, and industrial water problems.  The AQUASPACE line of products represent the best in the water filtration business. The revolutionary AQUASPACE^® Compound is a proprietary Aquaspace Water Systems formula that blends various types of activated charcoal with other active and inert ingredients.  This compound has been tested by the National Testing Laboratories.  The effectiveness and efficiency of the AQUASPACE^® Compound is without rival.  Aquaspace Water Systems strives to design the most attractive, maintenance-free, affordable water filters.  Aquaspace Water Systems is always developing to exceed the ever-expanding water satisfaction of our customers.