Feature: 1. More than 10,000 hours of service life, uniform light emission, very practical. 2. Environmental protection and drop resistance, high accuracy CNC machine cutting technology and one‑piece metal shell. 3. Common cathod electrode means 2 color indicator lights share a negative electrode. 4. Adopt fire‑resistant wire, enhanced conductivity, high temperature resistant flame retardant base, flame retardant in emergency. 5. The waterproof LEDs has built‑in waterproof sealing , 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: 3-6V 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