Item Type: Air Stone Bubble Diffuser_x000D_ Material: Plastic_x000D_ Weight: Approx. 24g/ 0.8oz 1Low pressure and usable design are suitable for any wattage pump, such as home, office fish tanks, aquariums and hydroponic nutrient tanks. 2Rotary control design can adjust bubble size and density, producing fine bubbles for oxygen replacement. 3Disc bubble stone emits more bubbles that are irregular, small and dense, providing a good oxygenation effect. 4Strong suction cup can be stably fixed and adsorbed on the acrylic or glass material of the aquarium in various positions. 5It is easy to disassemble with replaceable cotton piece, keeping the air stone bubble diffuser durable.2 x_x000D_ _x000D_ BubbleDiffuser 2 x Suction Cup 2 xReplaceable Cotton Piece