Improves filtration to prevent formation of line in pool or hot tub. Capable of absorbing oils, make water more clean and healthy. When saturated, simply squeeze out, clean and reuse. Keep your hot tub and pool for worry free enjoyment all season. Features - Color: White. - Material: Sponge. - Size: About 12.50X9.00X2.50cm/4.91X3.54X0.98inch. - Reduce maintenance and cleaning required. A great way to make your pool or tub more clean. - Made of sponge material, no odor, no harm, safe and durable for use. - Octopus and five-pointed star shaped design, not easy to break or deform, to support use. - Sucks up oils, and grime from hot tub, bathtub, water. - Easy and convenient to use, just put the sponge on the water, it will work greatly. Package list: 15 x five-pointed star sponges 15 x octopus sponges