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100W Glass Heater - Pro Heat E :
$16.99

For aquariums up to 20 gallons
Features:

• Fully Submersible

• Water proof construction

• Durable and reliable

• Horizontal or vertical mounting

• Visible temperature indicator

• Cord length: 6 feet

• Temperature range: 68° F to 89° F

• Precision ±1.8° F (±1° C)