Gentle and Clean: Casaheal's shower head water softener accessories let you enjoy a truly clean and comfortable shower experience. Our shower head hard water filter helps remove harmful impurities. Multi-stage Filtration: This shower filter removes chlorine and heavy metals, with water flowing through 15 different filtration stages. This filtration process ensures that only the cleanest, purest, and pH-balanced water flows from your shower head. Tool-free Installation: No toolbox is needed when changing shower head filter cartridges. Our shower head filter cartridges are very easy to replace and require no tools. Long-lasting and Durable: Each of our shower head water softener cartridges is carefully designed to effectively filter impurities and toxins from shower water and has a long service life. Each cartridge provides up to 2 months of filtered water. Affordable: You will receive a four-pack when you purchase this shower head hard water filter set. This shower filter replacement set provides up to 8 months of hard water filtration for your shower. Compatible with multiple shower filtration systems: CasaHeal 4-pack 15-stage shower filter replacement cartridges are compatible with a variety of shower filtration systems, including AquaBliss shower filter series (SF100, SF220), AquaHomeGroup shower heads, iSpring SF series (SF1S, SF2S, SF3S, SF4S), FEELSO shower heads, etc.