Soryusan Bathroom Shower Cartridge - Free Science

This is a Soryusen (素粒水) shower cartridge for the bathroom, from Free Science Co., Ltd.
(Includes 2 cartridges for the part indicated by the red arrow in the second photo.)

New, unused
List price: ￥4,950 (tax included)

I have extra cartridges due to a timing mismatch in replacement, so I am listing them for sale.
A large sticker with personal information is attached to the back of the outer box and cannot be removed cleanly. Therefore, I will cut off that side and send it opened as shown in the third photo.
The cartridge boxes are unopened.
This is a home-stored item, so please only purchase if you understand this.
(This product was received in March 2026.)

Shipping will be via Takkyubin Compact.

- Use: For bathroom showers
- Product Name: Soryusen Cartridge
- Filter Material: Granular acrylic resin
- Function: Water quality improvement
- Accessories: Cartridge for shower head
- Replacement Interval: Approximately 6 months
- Compatible Models: Fits shower heads