1-lamp Replacement Bulb for TotalPond UVRB and TotalPond UVC9 9 Watt UV Pond Clarifier * Works with 110 Volt 120 Volt 130 Volt 220 Volt 230 Volt 240 Volt * Reduces micro-organisms and bacteria , Water is sterilized using our 9 watt and water is pumped out into filter or pond * Replacement bulb for UVC9 , 9-Watt UV-C Germicidal Ultraviolet Replacement Bulb * Fits the G23 base, has one molded snap and is 6.5-Inch in length , Prevents DNA of germs to reproduce