Whisper Air Pump for aquariums up to 60 gallons has a patented dome shape and sound dampening chambers to minimize turbulence and produce a smooth quiet stream or air. Whisper Air Pump's wide footprint, rubber feet and suspended pump motor eliminates sound producing vibrations. Thick walls insulate motor noise and powerful diaphragms provide ample airflow for deep water applications. Whisper 60 Air Pump has dual air outlets. Uses standard size aquarium tubing. UL listed. Shipping weight: 2 lbs.