These indicator lights are mainly used to show the status of any indexing signal, anticipating signals or emergency signals. Widely used in industrial machinery, electrical equipment, machine tools, dashboard, home appliances.SpecificationLight Color: Red, GreenMaterial: Nickel Plated Copper, PA66Shell Color: Silver Tone, GrayWaterproof Grade: IP66Rated Voltage: AC 220VMounting Hole Diameter: 6mm / 0.24inchCable Length: 150mm / 5.9inchFit for Panel Max Thickness: 5mm / 0.2inchPacking List: 2Pcs x Indicator LightAdvantageMade of Nickel plated copper shell, impact resistance, corrosion resistance, vibration resistance, IP66 waterproof.Slim body good for installation places with narrow and small spaces. Energy-saving and low maintenance cost.InstructionEasy to install, simply drill a hole and tighten with nut, and connect this indicator light to any 220V power source.NOTE: Please confirm its size before buying, especially the thread size.