I purchased this item used and have been using it for about six months. I am selling it because I no longer need it due to a move. The item only includes what is shown in the photos; there is no box or instruction manual. Please understand this before purchasing. This is a CB-STKA6 model water purifier part with a chrome-plated finish. - Model: CB-STKA6 - Material: Chrome-plated - Included: O-ring Thank you for looking.