Automatic thermostat aquarium heater Mini Type 25w, 50w, 75w, 100w, 150w, 200w, 300w WattsLengthDiameter Liters25w18cm22mm<30L50w18cm22mm<50L75w22cm22mm<75L100w22cm22mm<100L150w24.5cm22mm<150L200w27cm22mm<200L300w29cm22mm<300LName: aquarium heaterModel: HT-1300Packing: 1 pc/ gift box, 100 pcs/ctnFeatures:Automatic temperature adjustmentCompletely submersible Double seal material Aquarium Heater