Good cleaning effect: You get 2 pieces of hot tub mineral sticks, which can effectively improve the water quality regardless of the water temperature, no matter it is cold or hot, it achieve good cleaning effect LONG-TERM USE: Our hot tub filters provide 24-hour flow, easy to install and save costs, last up to 120 days, improve your water quality for a long time, and suitable for most spa equipment and products Comfortable Experience: Hot tub spa mineral can improve water quality, reduce impurities and other components in the water, allowing you to enjoy a comfortable spa experience Convenient to Use: Hot tub mineral sticks are not affected by heat, just add them to your favorite water care system for quality spa water, easy to use and save your time and energy Colour:grey Material:plastic Package Contents: 4 x Filter Stick 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.