Anchor 8796 Engine Mount Both natural and Styrene and Butadiene rubber provide good abrasion resistance and aging stability to ensure maximum life and performance All rubber material is manufactured to a certain Durometer (hardness) measurements based on the vehicle's application requirements All fasteners are made of hardened steel with heat treated Grade #5 bolts A special Chemlock bonding agent is used to ensure a superior rubber to metal bond This product is produced by Anchor Industries however may be shipped in a non-Anchor branded package