The Insulator Kit w/Hardware is a practical and efficient solution for insulating your vehicle. This kit includes everything you need, such as (4) MA36000, (4) MA36500, (4) 7/8"-9UNC 4" Bolts, (12) 7/8"-14UNF 5" Bolts, (12) Locknuts, and (16) Flat Washers. Made with high-quality polyurethane, it fits most Mack makes and models, including OE parts Gaff 12039 and Mack. Ensure optimal insulation and protection with this comprehensive kit, designed to meet your needs.