Pure Crystal Softening Filter for Cats

Purchased from the official Amazon website.
I wanted to buy the half-circle type, but mistakenly purchased the full-circle type.
The outer bag has been opened once, but all 4 filters inside are still sealed and unused.

I felt it would be a waste to throw them away, so I am listing them in case anyone needs them. Thank you for your consideration.

Material: Resin
Brand: Pure Crystal
Item Weight: 0.26 Kilograms
Capacity: 1.5 Liters
Manufacturer: GEX
An economical pack of Pure Crystal replacement filters, specifically the softening filter, providing approximately 4 months of supply.
For maintaining lower urinary tract health! Gentle hydration for your cat! Ionic (ion exchange resin) removes magnesium and calcium from tap water, creating soft water that is gentle for cats.
Always fresh water! Activated carbon (including antibacterial activated carbon) adsorbs chlorine odor, making the water delicious. The non-woven fabric catches food debris, shed hair, dust, and other particles, maintaining clean water. To support lower urinary tract health, it removes magnesium and calcium from tap water. While magnesium and calcium are essential minerals for animals, preventing excessive intake can contribute to their health. It is also important to pay attention to diet, obesity, and lack of exercise. If you notice any abnormalities, please consult a veterinarian promptly. This product is not intended to treat any diseases.
Contents: 4 filters (approx. 4 months supply)
Compatible models: Pure Crystal 1.5L/2.5L, Bloom, Grassy, Nyaaro