High-quality materials Whirlpool cleaning accessories are designed in a form that is highly absorbent, soft, lightweight, and durable. The high-quality material and structure can help you continuously and effectively absorb dirt and grease in the whirlpool. Reusable and washable The reusable whirlpool foam absorber compared to the conventional filter ball, the combination of dark blue and black, we decided to produce a fixed ball filter ball that cannot be easily cracked and yellow, reused, and machine-made. Unique design The foam absorber balls select foam, the spherical product shape, use three-dimensional honeycombs to wipe away contamination and suck out grease, foam, mucus, and dirt in the swimming pool and spa pool water. Simply squeeze out the dirt, clean and reuse after working. Large These oil absorbing sponge balls with a diameter of 7 cm and a set of 4 pieces, we decided to establish a larger product size compared to most filtration products on the market, enlarge the contact area with the water surface and improve the adsorption rate. Wide Application The balls are suitable for a variety of occasions, the swirl sponge is suitable for whirlpools, swimming pools, bathtubs and spas, etc. have the same good performance inside and outside, which can avoid frequent water changes, help you absorb annoying foam, grease, emulsion and other stains in the water and enjoy clean and clear water every time. Colors: Blue Material: Polyurethane