Designed to securely fit Truck-Lite 40 Series, 44 Series, and standard 4-inch round lights, this heavy-duty grommet ensures a tight seal and dependable mounting in demanding commercial and fleet vehicle applications, including trailers, trucks, and construction equipment Constructed from premium black PVC, the grommet resists cracking, fading, and damage from UV exposure, road debris, and moisture, providing long-term durability and reliable protection for your lighting systems in extreme weather and tough road conditions The open-back design simplifies installation and maintenance by allowing quick wire access without removing the entire unit, saving valuable time during repairs while ensuring your lighting remains safely secured and fully functional Engineered to minimize vibration and shock, this grommet reduces the risk of lighting damage caused by rough terrain or continuous movement, while maintaining a steady, centered light position that supports enhanced road visibility and safety compliance Trusted by professional mechanics and fleet managers alike, the Truck-Lite TK40700-3 grommet is ideal for both OEM and aftermarket use, offering consistent quality, a 12-month warranty, and compatibility with a wide range of 4"" round LED and incandescent light assemblies The Truck-Lite Grommet Lighting (Part Number: TK40700-3) is a premium-quality mounting solution designed specifically for 40 Series and 44 Series 4-inch round lights. Made from durable black PVC, this open back grommet ensures a firm, shock-absorbent seal that protects lighting components from physical strain, moisture intrusion, and external wear. Built to meet the demanding needs of commercial and industrial fleet applications, the grommet is ideal for use in trailers, semi-trucks, construction vehicles, and utility rigs.Its open back configuration allows for seamless wire routing and easy maintenance access, reducing downtime during replacements or system checks. This feature also improves airflow around the fixture, helping reduce heat buildup that could impact performance over time. With a wide diameter and flexible build, the grommet simplifies mounting procedures while maintaining a snug fit around compatible lamps.The robust weather-resistant PVC material defends against UV rays, road debris, and corrosion — key factors for vehicles that operate in tough conditions, across diverse climates and terrains. Whether used in new installations or as a replacement part, the Truck-Lite grommet maintains its integrity and performance, even after prolonged exposure to heat, vibration, and the elements.Weighing approximately 9.7 ounces and with a 5.5-inch width and height, it’s compact yet durable, offering a stable platform for 4" round lights. It's compatible with a wide range of Truck-Lite lighting systems, making it a versatile choice for mechanics, service technicians, and fleet managers. The part comes with a 12-month warranty, reflecting Truck-Lite’s commitment to quality and performance in lighting accessories.If you're upgrading or replacing lighting on a heavy-duty vehicle, the Truck-Lite TK40700-3 grommet delivers the sealing reliability, installation ease, and rugged protection required to keep your lighting systems secure and road-ready.