This is a new, unused item. It has been stored at home. This set includes 3 cassette filters that remove trihalomethanes, and are easily replaceable. - Product Name: Torayvino Kasetty Series Trihalomethane Removal Type - Quantity: 3 filters - Compatible Models: MKC.T2J-Z - Substances Removed: Trihalomethanes - Replacement Method: Easy cartridge replacement Toray TORAY Torayvino faucet-mounted Kasetty series replacement cartridges (3 filters) for home water purifiers, trihalomethane removal type. The box is warped (see photos 5-9). Thank you for your consideration!