seelike RF-3001 Aquarium Pool Liquid Water Level Sensor Stainless Steel Float Switch alarms pumps 60mm Length Material: stainless steel SUS 304 (Float body) , SUS 316 (Float ball). Operating temperature : -10C - +120C. Easily converted from normally open to normally close . Making it ideal for high-heat, high pressure applications where corrosion-resistance is needed. Body Total Length (Approx) :60mm Color : Silver Tone;Net Weight : 46g;Package Content : 1 x Water Level Sensor.