Features:
1) 1x W28000 replacement mineral cartridge, Interchangeable part number W26001                                  

2) An excellent mineral cartridge replacement built to replace the old or failed cartridge, high cleaning performance. Used to keep your pool water clean and clear by cleaning debris, leaves, sands, hairs in the swimming pool         
3) Made of Premium ABS Engineering Plastic & Ceramic Particles, using mineral material to made, easily clean the pool water. The high hardness plastic housing is corrosion resistant, more durable and impact resistant, and can serve your filter system for a longer period of time. Good match, won't damage pool equipment or stain the pool                                  

4) Just takes a few minutes to replace, easy and quick installation. No more tool needed. If you are a beginner, it would be better to consult the professionals before installation. Tips: Best to change every 6 months