Set of 4 all-circle type water fountain filters, infused with negative ions and calcium. I'm selling these because I changed water fountains. I will ship via Rakuraku Mercari, so I will repackage them after removing them from the outer bag. (The contents are individually wrapped, so please don't worry.) Please purchase only if you understand. - Type: All-circle type - Quantity: 4 pieces - Features: Maintains health with negative ions and calcium - Usage: Filter to keep water clean - Brand: Pure Crystal Thank you for viewing.