Features:

Increase oxygen levels, lower CO2 and raise PH, creates water currents
It is an important instrument to successfully keep aquatic fish for respiration process.
Durable, can be reused and washed repeatedly.
Strong Suction Cup.
Rotary design to control the bubbles.
Creates bubbles in fish tank while attached to an air pump.

Specifications:

Color: Black (white pad)

Material: plastic (cotton pad)
Air Stone Size: Approx. 3.5x6.5cm
Dia. of replace cotton: about 3.2cm
Air Tube:Length 3M,Inner dia. 4mm.; Outer dia. 6mm
Air Pump Size: (approx.): 7cm*3.5cm*3.2cm
Specification of the Plug: EU Plug
Rated voltage: AC 220V  Frequency: 50HZ
Rated power: 2W
Pressure: 15Kpa
Length of the cable : about 41cm
Flow: 1.2L / min

Package include:
1Set Aquarium Air Bubble Stone and air pump

Note:

-Soak in water for 15 minutes before use.

-For long-term use, if there is dirt blockage, and the bubbles is reduced, please take it out of the fish tank and wash it again and again.

-The air stone can be used repeatedly.

-Please allow 1cm differs due to manual measurement.

-Due to the different display and different light, the picture maybe a little different with the actual color of the item. Thanks for your understanding.