Zxlight&reg;trailer Semi Rig Truck Bus LED Commercial 12v LED Tail Lights Taillights (Pair) Pair of 12V LED Tail Lights - High Brightness great for trailers, campers, trucks ! it is not for RV Material ABS Plastic. Space between set screws 305mm Length of screw 20mm Length of connecting line 200mm For the wire line, black-- main line, yellow-- turn light, white-- reversing light, green--tail light, red--brake light. Input voltage: 12V DC Product Features: 1. Lifespan 30000 hours 2. Function: red for stop, amber for indicator and white for reverse 3. Universal combination lights for medium and large size trucks and trailers 4. Energy saving ,low temperature and stable output. No Instructions or installation guides will be provided 44 Bright Long Lasting LEDs in each tail light that can be seen from miles away!