Size:L Quantity:1 batteries required:No Batteries Included:No Item Weight:10 g Specification: With Suction CupOur carbon dioxide bubble counter is equipped with a suction cup, which is firmly fixed, not easy to slip, and easy to use. Transparent Acrylic Bubble CounterThis CO2 bubble counter is made of highly transparent acrylic, which can easily observe the output of carbon dioxide, which is convenient, practical and beautiful. High Quality MaterialsOur fish tank CO2 diffuser is made of transparent acrylic material, which is sturdy and durable, has no effect on water quality and fish, and can be used with confidence. Bubble Counter RefinerOur fish tank CO2 diffuser has an independent bubble counting function, good air output, high dissolution rate, and more practical. Quality GuaranteeQuality checks strictly in every section during the fabrication. If you have any questions about our product, please contact us. We will be very happy to answer questions and resolve problems for you. See more product details With Suction CupOur carbon dioxide bubble counter is equipped with a suction cup, which is firmly fixed, not easy to slip, and easy to use. Transparent Acrylic Bubble CounterThis CO2 bubble counter is made of highly transparent acrylic, which can easily observe the output of carbon dioxide, which is convenient, practical and beautiful. High Quality MaterialsOur fish tank CO2 diffuser is made of transparent acrylic material, which is sturdy and durable, has no effect on water quality and fish, and can be used with confidence. Bubble Counter RefinerOur fish tank CO2 diffuser has an independent bubble counting function, good air output, high dissolution rate, and more practical. Quality GuaranteeQuality checks strictly in every section during the fabrication. If you have any questions about our product, please contact us. We will be very happy to answer questions and resolve problems for you.