Features 1、This dual color LED indicator light is uniform and has a life span of more than 10,000 hours. 2、The flat head 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、This metal pre-wired LED has a built‑in waterproof sealing loop, which is waterproof and dustproof. 4、The signal LED 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. Specification Item Type: 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 Function: Common cathode (common negative electrode) Light Source Type: LED Working Temperature: -40℃~70℃/-40℉~158℉ Working Humidity: 10%-90% Shade Type: Flat head Protection Level: IP67, IK10 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. Size: Approx. 8mm / 0.3in Package List 4 x LED Indicator 4 x Compression Nut 4 x Washer