Features:

-100% brand new quality and high quality

-Product green resin, non-toxic, corrosion-resistant, acid resistant, durable, safe to use

-Increase oxygen content, reduce carbon dioxide content, increase pH value

-It is an important tool to watch and preserve aquatic fish for respiratory process

-Bubbles in fish tank when connected to air pump (excluding air pump)

-Widely used in all sizes of fish tank

Specifications:

-Color: as shown in the picture

-Material: resin

-Size: about (L * h) 2.56 "* 1.97"

-Applicable to: 4mm inner diameter hose

be careful:

-1. Please allow 2% difference due to manual measurement

-2. Due to the resolution, brightness and contrast of the computer screen, the true color may be slightly different from the picture. I hope you can understand

The package materials include:

-1 x bubble volcanic rock (tubeless)