Item Type: Metal LED Indicator Light Material: Brass chrome plated Uses: Car modification, computer modification, access control switches, CNC machine tools, industrial control instruments Installation Size: M8 x 0.75mm Voltage: 12-24V Function: Common cathod 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. 8mm / 0.3in Features: Common Cathod Electrode Means: 2 color indicator lights share a negative electrode After selecting the common cathod electrode, the black line is the common negative electrode, the red line is the red light (positive), the green line is the green light (positive), red and yellow, red and blue are the same. Package List 4 x LED Indicator 4 x Compression Nut 4 x Washer 1The metal LED indicator light is uniform and has a life span of more than 10,000 hours. 2This LED indicator has high accurate CNC machine cutting technology, and the metal shell has high structural strength, which is more environmentally friendly and resistant to falling and collision. 3The 8mm LED light has a builtin waterproof sealing loop, which is waterproof and dustproof. 4This LED light has flameretardant base, high temperature resistance, flameretardant in emergency situations, fireretardant wire, enhanced conductivity. 5Common cathod electrode means 2 color indicator lights share a negative electrode.