DescriptionFeatures:High Quality: The aquarium heater is made of high quality quartz glass and ABS plastic, double sealing material, advanced design, ensure safe operation. Temperature adjustment: The temperature of the Fish tank heater can be adjusted. temperature setting range: 20°~34°C (68°F - 93°F).This fish tank heater should be 100% immersed in water. Power: 25W / 50W / 100W / 200W / 300W optional. Convenient and Safe: The aquarium heater has two suction cups for attaching to the fish tank. constant warm for your tropical fish to stay healthy.Features:Item Name: Aquarium HeaterMaterial: Quartz Glass + ABS PlasticPower(Optional): 25W/50W/100W/200W/300WVoltage: 110V-120V; 220V-240V25W Aquarium heater: Productweight: 138g; Product length: 20cm; Package size: 2474cm; Package weight: 171g; suitable aquarium: 30-50cm 50W heater Aquarium: Product weight: 135g; Product length: 20cm; Package size: 2474cm; Package weight: 168g; suitable aquarium: 30-50cm100W Aquarium heater: Product