Features: Increase oxygen level,easy and convenient to use. It is important instrument to keep fish for oxygenationprocess. Creates bubble in Fish Tanks while attached to air pumps. Creates water current and better underwater scene. Suitable for home aquariums, office fish tanks, and small decorative aquariums, ensuring a better environment. Specifications: Component: Mineral stone + Copper Size: length 4cm(1.57in) Suitable for inner diameter 4mm soft tube Color: As pictures show Package Includes: 1Pc xBubble Stone(No retail package) note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.
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