Cast Products has engineered a wide variety of specialized products to fully customize your 2019-Current International CV and Chevy 3500/4500/5500 HD ambulance. In-the-Bumper Aluminum Speakers and model specific light housings provides maximum warning and illumination on the front, intersections, and sides of your ambulance. Our all-aluminum products are engineered specifically to withstand the rugged conditions that your ambulance will go through, and will outlast its plastic competitors.