Experience: our spa mineral stick for hot tub is made of quality ABS plastic material, sturdy and reliable to use, the inside of the mineral sticks part is rich in mineral elements, can effectively adsorb some impurities in the water to create a better water environment , providing you with better spa experience. Long Serving Time: our mineral sticks part has a maintenance time of up to 4 months, and the mineral sticks part can keep your water clean, so you can enjoy a comfortable spa experience without often checking or replacing the filters. Package Content: you will receive 3 pieces spa mineral stick parts in 2 colors, namely blue and yellow, 2 pieces for blue and 1 for yellow; The spa mineral stick parts can keep clean and clear water for a long time and satisfy your needs for replacement. Easy to Install: this mineral stick for hot tub is equipped with a complete manual, and you can complete the installation quickly according to the steps of the manual, individually packaged, easy to store. Suitable Size: The installed length of the spa mineral stick for hot tub is about 41 cm/ 16.1 inches, the widest diameter is 3 cm/ 1.2 inches, please make sure the length of your filter fit before purchase, which is suitable for 500 gallons/ 2000L spa and hot tub. Colour: blue+yellow Material: plastic Package Contents: 3 * spa mineral stick Only the above package content, other products are not included. Note: Light 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.