["brand new and high quality\nFeatures:\nMade of high quality of materials.\nUse with CO2 indicator.\nEasy to use and convenient to detect concentration of CO2.\nSuitable for all kinds of fish for tank.\nA wonderful solution for feeding fish and observing their living condition.\nDifferent color of liquid represents different concentration of CO2.\nBLUE means that CO2's concentration is too low.\nGREEN means it is normal.\nYELLOW means that CO2's concentration is too high so that it is harm to fish.\nCO2 indicator Solution Liquid and Detector only,other accessories demo in the picture is not included.\n\nSpecification:\nMaterial: Glass\nBottle Height: app.7.7cm/3.03in\nInner Packaging Size: app.11.5x11.5x4cm/4.53x4.53x1.57in\nNet Weight: 15ml\nColor: As the pictures shown\nQuantity: 1 Set\n\nNote:\nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage Contents:\n1 x CO2 indicator Solution Liquid\n1 x Detector"]