This is something I received from a friend last week. The box was dirty, so I threw it away. [Product Description] This is an MX600 cartridge for Toray's (Toray Industries) Casette series water purifier. It is new and unused. It can be used with all Casette series main units (products starting with the model number MK). [High Removal Type] Clears JIS 13 items [Compatible Models] MK307MX, MK204MX, MK205MX, MK203X, MK304MX, MK206SMX, MK309SMX, MK308T, MK305T, MK502T [Other] ・Please refrain from price negotiations. ・As this is a new and unused item, returns and exchanges are not accepted.