Sunsun 55W UV Ultraviolet Sterilizer Light Clarifier Aquarium Pond Koi Lamp Bulb Filter 55 Watts, 25" length AC 110-120V / 60Hz (USA, Canada, Japan) Suitable for ponds up to15000 gallons Inlet/outlet size: 3/4", 1", 1-1/4" & 1-1/2" Max Flow Rate:4400GPH