Suitable for pond or aquariums. Perfect water leakage proof design Available in 18W, 36W, 54W versions UV bulb and internal independent electronic ballast included Safe and reliable with safety approved internal ballast and critical components Made in China Filter & Pump Specs FEATURE UV sterilizer Voltage 110V | 60Hz UV Power 18W or 36W or 54W Dimension 17.8" long by 2" diameter (18W) Up to 1000G 22" long by 2" diameter (36W) up to 2000G 29" long by 4" diameter (54W) up to 4000G Plug Type Type C