Item Type: Fish Tank Accessories Material: Stainless Steel + Plastic Spherical Stones Size: Approx. 40mm / 1.6in Type: Aquarium Products 1¡¢The accessories are complete, including air stone, red check valve, suction cup, T-connector, straight connector, l-connector and water pipe. 2¡¢Easy to use and remove, without any professional requirements even though you are an amateur. 3¡¢Effectively help the fish keep healthy and has no effect on the growth of hydroponics, but can promotes it. 4¡¢With multiple options and combinations, the air stone can be easily driven by an air pump. 5¡¢Perfectly suitable for fish tanks, fish bowls, aquariums, hydroponics and so forth. 1 x Water Pipe 4 x Bubble Stone 4 x Check Valve 4 x Control Valve 4 x T-Shape Connector 11 x Suction Cup