Natural Spa Experience: The nature spa mineral stick can automatically add to the hot springs, reducing impurities in the hot springs to create clearer and cleaner water Safe Materials: Our well-made mineral sticks are made of premium ABS plastic, strong and odorless. Long Lasting: Our hot tub sticks for spas up to 500 Gallons/2000L. Spa mineral stick has a maintenance time of up to 4 months. Easy to Install: Just put the spa wand into the existing filter and let the hot tub wand work Wide Application: Suitable for most spas and hot tubs also compatible use for inflatable spa and plunge pools and most easy-to-use standard bathtubs Quantity:2pcs Colour:Blue & Yellow Material:Plastic Package Contents: 2 * mineral sticks for hot tub 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.