The Roadmaster 152-LED Taillight Wiring Kit with LED Bulbs is a comprehensive towed vehicle wiring kit. It includes a 25' wiring harness, two electrical pigtails, two sockets, two red LED bulbs, wiring split loom, zip ties, wiring supplies, and installation instructions. Sockets fit a 1" diameter hole.• Red LED bulbs for a truly red taillight appearance• Low-profile sockets fit the widest range of vehicles• 450 Lumens of light output• LEDs are brighter, last longer, and won't melt your taillight lens• Completely isolates the RV wiring from the towed vehicle electrical system• Sockets have the same pin arrangement as an 1157 taillight bulb• Satisfies legal requirements for towed vehicle lightingNote: The LED bulb protrudes 1-7/8" from the surface of the mounting hole. Make certain your taillight assembly has sufficient depth to accommodate these bulbs. Low-profile sockets fit a 1"" diameter hole Completely isolates the RV wiring from the towed vehicle electrical system Includes 25' wiring harness, 2 electrical pigtails, & 2 sockets with red LED bulbs | Roadmaster Taillight Wiring Kit with LED Bulbs in Red