HIGH QUALITY MATERIALOur spa mineral sticks are made of high quality and healthy ABS materials, odorless and with fine workmanship. Directly fall into the spa filter, keep the water fresh and clear for a long time, bring you a natural and healthy spa. EXCELLENT FILTRATION SYSTEMMulti-layer filtration of the spa mineral filter makes the water healthier and can effectively filter a variety of impurities, keeping the spa water in good quality and keeping your bathtub clean. EASY TO USE AND REPLACESimply place the mineral stick parts into your spa filter or skimmer basket and let them do their job, no other complicated processes are needed. LOW MAINTENANCEWith our spa filter cartridge, can provide up to 4 months of service for your spa filter, and the maintenance cost is extremely low, helpful to save your time and costs, you will not have to check or change it for the next four months. WIDELY APPLICABLEThese spa cartridges are suitable for most spas and hot tubs, also compatible with inflatable spas, jacuzzis, walk-in tubs, outdoor swimming pools, baths, plunge pools and standard bathtubs, the easiest to use. Size: 3.2x3.2x41cm Weight: 124g Product color: yellow Product size: ABS + minerals Packing list: 1 piecebecomeveryrich