[Wide Compatibility]Engineered as a direct salt system cartridge replacement for Caldera Utopia, Hot Spring Highlife, Limelight and Hot Spot Collection spas, as well as Paradise and Vacanza Series models from 2022 or later, ensuring a precise fit and stable performance for your existing Freshwater salt system. [Easy to Install]Designed for hassle‑free DIY replacement, this salt system cartridge requires no special tools or extra parts. Simply follow the control panel instructions: power off the spa, use the press‑to‑lock design to twist out the spent cartridge, then twist the cartridge into place to quickly restore proper sanitizing performance. [Advanced Technology]This Hot Springs salt cartridge works seamlessly with your spa's saltwater system, electrolyzing dissolved salt into chlorine to keep water crystal clear with balanced pH while helping reduce scale buildup. Enjoy softer, silkier water that feels gentle on skin and eyes, with less traditional chemical odor in your hot tub. Color: Black Material: plastic Package Contents: 1*Hot Spring Salt System Cartridge Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.