The Peterbilt 378, 379, 388, and 389 2005 and newer Donaldson Rear Air Cleaner Light Bar is a practical and durable accessory made of stainless steel. It is designed specifically for 13-inch standard Donaldson cans and measures 20.5 inches with a 2.63-inch mount. Each light bar comes with six 2-inch round light holes and is sold in pairs. The package includes a wiring harness with Packard plugs for easy installation. This light bar attaches to the brackets between the hood and the air cleaner on both sides, fitting most Peterbilt 378, 379, 388, and 389 2005 and newer makes and models.