HQRP 4-Pack Carbon Filter C for Holmes HAP726, HAP750, HAP756, HAP759, HAP715, HAP725 Air Purifiers Coaster HQRP&reg; 4pcs Carbon Odor Air Purifiers Filter C plus HQRP&reg; Coaster; Enhanced with baking soda to absorb and eliminate household odors; Traps household chemicals and cigarette smoke; For use with See Side Panel, cannot be used independent of the main purifier filter; Dimension size: 6 x 9.25 inches; 2 weeks DOA replacement warranty!