Thank you for viewing this item. Product Name: Non-woven Activated Carbon Filter (Oil Filter) Set of 3, Yoshikawa Co., Ltd. Diameter: Approximately 9cm. Brand new and unopened. I previously purchased these as stock and stored them at home, but I no longer have a need for them, so I am offering them for sale. Please refer to the photos for usage instructions and precautions. The outer box will be folded and included. I apologize, but I am unable to sell these individually. Thank you for your understanding. They will be packaged with bubble wrap and sent via Yu-Packet Post. If you have any questions, please feel free to comment. Immediate purchase without comment is also welcome. Thank you for your consideration! #OilPot #OilTreatment #Filtration #Cartridge #Reuse #OilFilter