Anchor 8702 Transmission Mount Both SBR (Styrene Butadiene) and natural rubber provide good abrasion resistance and aging stability to ensure maximum life and performance for your vehicle To ensure a superior rubber to metal bond, Anchor uses a special Chemlock bonding agent Based on the vehicle's application requirements, all rubber is measured to the specific Durometer measurements Designed with hardened steel fasteners with heat treated Grade 5 bolts