Oxygen air stone

Diffuser oxygen in four sizes.
The air stone is important for fish oxygen.
Soak the stone in water for fifteen minutes before use.
Clean regularly with a brush as they get clogged after months of usage.
 

Specifications
Sizes
Diameter of 6cm and 2.3″
Diameter of 8cm and 3.1″
Diameter of 10cm and 3.9″
Diameter of 15cm and 5.9″
Diameter of 20cm and 7.8″
 
 
Notes
The real product colors may be slightly different from what you see in the images.
The product dimensions may be slightly different from what is written in the product specifications.