The mini aquarium heater is made of carbon fiber. It's small and won't take up much space. The mini heater is used to heat the aquarium water and even the turtle tank water, and it can't hurt the small animal. Specifications: Material : carbon fiber Power: 16W Cable length: approx. 147cm/57.87inch Voltage: 220V Plug Type: EU Plug Package List: 1x Heater Notes: 1. Please allow 0-2cm error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as the standard. Small size: The heater is small, easy to operate, and it won't occupy much space The mini water heater is used for heat fish tank water and even turtle tank water; not hurt the small animal Anti-dry safety protection: designed with anti-dry technology, convenient to use Constant temperature: designed with the 25 , you can not adjust the temperature Suction cup design: designed with the suction cup, easy to attach the aquarium heater