Filter with a 150-liter purification capacity, 4 filters per box for long-term use. - Quantity: 2 filters - Purification Capacity: 150 liters - Model Number: KBMDCZ231 The box is marked as containing 4 filters, but since I used two, there are 2 filters remaining. As shown in the fourth photo, the box has some scratches. Please feel free to contact me if you have any questions. Thank you for looking.