● Ionic (ion exchange resin) removes magnesium and calcium from tap water, creating gentle water (soft water). ● Activated carbon (antibacterial activated carbon) adsorbs chlorine odor and makes delicious water. ● Non-woven fabric catches food debris, hair, dust, etc., maintaining clean water. Applicable product: For GEX Pure Crystal only Size: Approximately 145mm in diameter 5 pieces remaining, as 1 piece was used. The packaging has faded due to home storage. Please refrain from purchasing if you are concerned about this. Thank you.