Humming Water A & B Set Water Purifier Cartridge, Replacement Filter. - Filter Type: Water Purifier Cartridge - Model: A (Micro Filter EX) & B (Ultra Filter EX) Set - Brand: Humming Water - Packaging: Cardboard box Received in mid-August 2025. Stored in a regular household. I have a dog, and while I am careful about hair, please refrain from purchasing if you are overly concerned. I am not responsible for any accidents or damage during shipping. I look forward to a smooth transaction with a pleasant buyer.