Quality Material: Our hot tub mineral sticks are made of healthy and high quality ABS material, no odor and exquisite workmanship. Drip directly into the spa filter to keep fresh and clear water for a long time, bringing you a natural and healthy spa treatment. Excellent filtration system: The multi-layer filtration of the mineral filter rod makes the water healthier, can effectively filter various impurities, keep the water quality good, and keep the bathtub clean Easy to use and replace: Just drop this mineral stick into your spa filter or skimmer basket and let them do the job, no other complicated processes required. Wide Applicability: Compatible with most spas and hot tubs, also with inflatable spas, Jacuzzis, walk-in tubs, outdoor pools, spa pools, tubs, plunge pools and most easy-to-use standard tubs compatible. Shipping Quantity: 1 Piece Product color: yellow Product size: 41*3.2*0.9cm