Rust and Corrosion Resistance --- This aquarium heater is made of high quality stainless steel material, which is sturdy, resistant to rust and corrosion. Double-layer waterproof protection design --- This aquarium heater adopts double-layer waterproof protection and fully submersible design, can accurately maintain the set temperature and not short circuit. Thermostatic design --- This aquarium heater adopts double-metal silver-plated contact temperature control and internal fixed temperature setting process, which has strong temperature sensitivity and small error of temperature. Wide temperature range and great depth --- This aquarium heater can be set from 18 to 34 degrees. Its maximum immersible depth is 120 cm and is suitable for use in fresh water. With strong suction cup --- This aquarium heater with strong suction cup can fix the water heater firmly on the tank and keep stable for a long time. Product Color: 50W Specification: Condition: brand new Material: stainless steel Color: as picture show Temperature range: 18-34 degrees Voltage: 220V-240V 50HZ / 60HZ Size: approx. Type Bar length (CM) Wire length (cm) Capacity (L) 50W 19.3 146 50-100 100W 19.2 75-150 200W 28.2 100-200 300W 32.5 200-300 500W 37.2 300-400 Packing list: 1 * heating bar