Item Type: Pre-wired Round LEDs Material: Chrome-plated brass Uses: Car modification, computer modification, access control switches, CNC machine tools, industrial control instruments Installation Size: M10 x 0.75 Voltage: 110-220V Function: Common cathode electrode Light Source Type: LED Working Temperature: -40℃~70℃/-40℉~158℉ Working Humidity: 10%-90% Shade Type: Flat head Protection Level: IP67, IK10 Size: Approx. 10 mm / 0.4 inch Features: Common cathode electrode means: 2 color indicator lights share one negative electrode. After selecting the common cathode electrode, the black wire is the common negative electrode. The red wire is for the red light (positive), the green wire is for the green light (positive). Red and yellow, red and blue are the same. Package Contents: 4 x LED Indicators 4 x Compression Nuts 4 x Washers Customers are our top priority. If you find any issues with your product after receiving it, such as damage or incorrect quantity, please contact us immediately. We strive to provide you with the best after-sales service.