The Peterbilt Exhaust Mount IFTA Permit Holders are a practical and durable solution for keeping your IFTA permits secure on the road. Made of stainless steel, these holders are built to last and come in a pair to fit most Peterbilt 379 and 389 models. With their sturdy construction, these permit holders provide a reliable way to display your permits while ensuring they stay in place during travel. Keep your permits easily accessible and secure with the Peterbilt Exhaust Mount IFTA Permit Holders for Models 379 and 389.