CL-300 Aquarium Chiller unit. Heater control addition included. High Quality, durable, completely enclosed. Digital control. Titanium heat exchanger. db rating 38 Water flow 500gph minimum/800gph maximum. 12"L x 12" W x 13.5"H 10 degree cooling up to 110 gallons 30 degree cooling up to 60 gallons This is a drop ship item.