Full-circle water filter that helps maintain lower urinary tract health, removing magnesium and calcium, and using plant-derived materials. - Contents: 7 pieces (4 pieces + 3 pieces) - Filter Type: Full-circle type - Features: Magnesium and calcium removal - Materials: Plant-based plastic Thank you for viewing. Although it is new and unused, it is thick, so I will open the outer bag and ship it. Please apply only if you understand this.