I am selling this item because I accidentally purchased the wrong size. It is new and unused, but I opened the box and it is slightly torn. Please refrain from purchasing if you are concerned. Antibacterial cartridge specifically for SHIZUKU, usable for approximately 6 months. - Model Name: ACA-002 - Package Contents: 1 pack (approximately 6 months) - Antibacterial Function: Antibacterial cartridge - Compatible with: SHIZUKU only - Country of Manufacture: MADE IN CHINA Thank you for viewing.