seelike RF-3001 Mini Vertical Stainless Steel tank Liquid Level Sensor Horizontal Float Switch 60mm Length Material: stainless steel SUS 304 (Float body) , SUS 316 (Float ball). Operating temperature : -10C - +120C Making it ideal for high-heat, high pressure applications where corrosion-resistance is needed. It also ok use them with hydroponics, saltwater tank, freshwater tank, gardening, aquariums for power head control, pet bowls, fish tanks, filtration, heating, pumps, ponds, basement alarms, boats . Body Total Length (Approx) :60mm Color : Silver Tone;Net Weight : 46g;Package Content : 1 x Water Level Sensor.