Searching of a fish tank dissolved oxygen device? Our fish tank dissolved oxygen device will be the for you. Made of , durable enough for your long-term use. Practical and portable design, ensures its popularity. Features -Color:Transparent -Material:Glass -Size:8.00X4.00X2.80cm/3.14X1.57X1.10in -Attaches to the aquarium glass wall with the 2 suction cups provided. workmanship, sturdy and durable, practical CO2 , adding beauty to your fish tank. -It can create bubble that will make your aquarium look more beautiful. -The installation method is simple and easy to use, save your effort. -Oxygenate your aquarium, create healthy and lively environment for your pet fish. -Compact size, does not occupy much space, make your fish tank look more neat and tidy. Package list: 1 x 1 x non-return valve 1 x suction cup 1 x U-shape tube