1、Stainless steel spinning axis, fits for both fresh water and salt water. 2、Adopts high quality plastic material, sturdy and durable. 3、Build-in special slot to protect the motor. 4、360° rotatable wave, higher flow rates and lower energy consumption. 5、Perfect wave maker to provide solid circulation for aquarium or fish tanks. Features: Stainless steel spinning axis, fits for both fresh water and salt water. Adopts high quality plastic material, sturdy and durable. Build-in special slot to protect the motor. 360° rotatable wave, higher flow rates and lower energy consumption. Perfect wave maker to provide solid circulation for aquarium or fish tanks. Specification: Material: Plastic Color: Gray Optional type: Single Head with Suction Cup 8W / Single Head with Suction Cup 12W / Dual Head 12W / Dual Head 24W Size: Single Head with Suction Cup 8W: 12cm / 4.72 inch(Approx.) Single Head with Suction Cup 12W: 14cm / 5.51 inch(Approx.) Dual Head 12W: 9cm / 3.54 inch(Approx.) Dual Head 24W: 15.5cm / 6.10 inch(Approx.) Package list: 1 * Aquarium wave maker Notice: Please kindly make a note if you need a adapter. Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.