Specifications:

Color: Black (white pad)

Material: plastic (cotton pad)

Item Size: Approx. 3.5x6.5cm
Dia. of replace cotton: about 3.2cm

Air Tube: Inner dia. 4mm.; Outer dia. 6mm

Package include:

1pcs /2pcs Aquarium Air Bubble Stone

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.