Description This item is a novelty air stone aerator, which is made of durable plastic. It features cartoon turtle shape, using blue fine sand firing, uniquely shaped, air out uniformly. Suitable for various fish tank and aquarium use. Features - Color: As shown. - Material: Bubble stone. - Size: About 10 x 10 x 2cm. - Made of high temperature sintering, the effect of dissolving oxygen is several times that of ordinary bubble stone. - Different from the general bubble stone,this bubble stone is durable and can be repeatedly cleaned, long-term use. - Using blue fine sand firing, uniquely shaped, air out uniformly. - Suitable for various fish tank and aquarium use. - Soak the product in water for 15 minutes before use. - Note: need to rely on oxygen pump to achieve the desired effect. - Warm Tip: Dear buyer, Due to lighting effect, monitor's brightness, manual measurement and etc, there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Made of high temperature sintering, the effect of dissolving oxygen is several times that of ordinary bubble stone. Different from the general bubble stone,this bubble stone is durable and can be repeatedly cleaned, long-term use. Using blue fine sand firing, uniquely shaped, air out uniformly. Suitable for various fish tank and aquarium use. Soak the product in water for 15 minutes before use.