This is a Aqua One 55 Watt 20.5cm Glass Aquarium Heater for Fish Tanks 55 Litres. Aqua One Glass Heaters makes it easy to maintain the correct temperature, by providing accurate adjustable temperature and exceptional durability.

Features:

• Glass heater for aquariums
• 55 Watt 20.5cm
• Completely submersible with double insulation
• Large temperature range from 200C - 340C
• Automatic shut off and on light