Dear，Pls leave a massage to tell us what design (Color) do you want.thank you.

Type : 25W， 50W， 100W， 200W， 300W (choose one you like )If you keep an aquarium at home， and want your fish to sweem healthy and happy in your fish tank， you need to provide them with an appropriate and easily adjustable heater， so you will be able to change the water temperature for your fish at any season in the year.We are happy to present to you this series of heaters， so you can choose one according to your tank size. FeaturesShatterproof glass， easy to use， safe， precise.Aquarium water temperature.Plastic cover protector (removable).Includes two suction cups for mounting.Fully submersible heaters work in any position (horizontal or vertical) to provide optimum.Temperature range between 65°F and 93°F.Automatic shut off when the temperature is reached.Safe and reliable in both fresh and salt water aquariums.Sensitive and reliable thermostat maintains uniform temperature. SpecificationsVoltage: 220-240V Frequency: 50 / 60HzDiameter: 0.875 inchLength Of Power Cord: 2.9 feet Power Length Recommended Tank Size25W 136.5mm / 5.4inch 5 to 8 gallon50W 158mm / 6.12inch 10 to 18 gallon100W 183.6mm / 7.2inch 20 to 33 gallon200W 234mm / 9.2inch 40 to 66 gallon300W 320mm / 12.6inch 60 to 100 gallon Package Includes1 x Fish Tank Water HeaterImportant:Fish Tank Water Heater needs to fully immersed in the water