Feature: 1. The LED light emits uniformly, with a life span of more than 10,000 hours. 2. Common cathod electrode means 2 color indicator lights share a negative electrode. 3. High‑accuracy CNC machine tool cutting technology, one‑piece metal shell has high structural strength, resistance to fall and collision. 4. Flame‑retardant base, high temperature resistance, flame‑retardant in emergency situations, fire‑resistant wire, enhanced conductivity. 5. The product has built-in waterproof sealing ring, waterproof and dustproof. Specification: Item Type: Pre-Wired Round LEDs Material: Brass chrome plated Uses: Car modification, computer modification, access control switches, CNC machine tools, industrial control instruments Installation Size: M12 x 0.75 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. 12mm / 0.5in 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