300 Watts-Aquarium Glass Submersible Heater (Tank Size 60-100 Gallon) Temperature Range 20~34'c (68&deg;f and 93&deg;f.) Easy to attach on aquarium tank wall with 2 suction cups Temperature range: 20~34'C (68~93'F), suit for tank size 60-100 Gallon Totally submersible, waterproof double insulation and durable. Automatically adjust the temperature Safe and suitable for fresh water aquariums Material: Plastic+ glass