3M OAC50RF Filtrete Replacement Filter for OAC50 Office Air Cleaner Type: Replacement Filter Size: 10.25 x 4.25 x 1.75 Used For: Air Purifier Odor Reduction: Yes Feature: Filtrete Replacement Filter for OAC50 Office Air Cleaner for Cubicles. Electrostatic filter media with built in activated carbon filter helps purify the air and reduce odors in the office. Labor: 1 year limited Parts: 1 year limited