CFS grooved sediment cartridges are designed for effective mechanical filtration, capturing sand, dirt, silt, and rust from cold water supplies. The grooved outer surface increases filter area, providing higher dirt holding capacity and consistent flow, reducing pressure drops over time. Compatible with standard 2.5 x 9.75 inch housings like AP110 and AO-WH-PREV-R2, these cartridges are independent, non-OEM replacements, made of polypropylene that keeps indefinitely in packaging. Ideal for municipal or light well water, they do not reduce chlorine taste or odor, so a carbon filter can be added after for taste improvement. Replace when flow decreases, supporting long-term water clarity and appliance protection. Ships tracked from USA, duties included, delivery in 14-16 days.