One cartridge included. This is an authentic product, purchased through a subscription service. I opened the box for the photos, but the film on the cartridge itself is unopened. The high-performance activated carbon filter JF-21 can be used 5 times and is ideal as a replacement cartridge for water purifiers. - Brand: INAX - Model Name: JF-21 - Filter Type: High-performance activated carbon - Usable Times: 5 times - Compatible Models: JF-22, JF-21, JF-21-1, JF-21-2 - Color: Blue - Condition: New Stored at home. Thank you for looking.