1、The metal LED indicator light is uniform and has a life span of more than 10,000 hours. 2、This 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. 3、The 8mm LED light has a built‑in waterproof sealing loop, which is waterproof and dustproof. 4、This LED light has flame‑retardant base, high temperature resistance, flame‑retardant in emergency situations, fire‑retardant wire, enhanced conductivity. 5、Common cathod electrode means 2 color indicator lights share a negative electrode. 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, IK10Size: 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. 4 x LED Indicator 4 x Compression Nut 4 x Washer