Material: PlasticSize: 18*85mm/ 0.71*3.34inchColor: BlackFeature:1. Intelligent constant temperature heating: The mini heating rod adopts automatic constant temperature technology to accurately control the water temperature of the aquarium and provide a stable growth environment for fish.2. Compact and portable design: It is small in size, easy to install and hide, does not occupy the space of the fish tank, and is suitable for various small aquariums.3. High efficiency and energy saving performance: Low power consumption heating technology, rapid heating while reducing power consumption, long-term use is more economical and environmentally friendly.4. Safety protection upgrade: Equipped with anti-dry burning protection function, it automatically stops working when the heating rod is out of the water to ensure the safety of the equipment and the fish tank.5. Select high-quality corrosion-resistant materials, and adaptable to various water conditions.Note:1. Manual measurement may have an error of 1-2cm. Please understand, thank you.2. Due to the difference between different monitors, the image may not reflect the actual color of the item.Package includes: 1* automatic constant temperature heating mini heating rod for fish tank