Bosch OE heritage: 77 years of OE braking excellence promises the highest quality performance, industry-leading strength and durability, and exclusive innovations including Molded Shim Technology (MST); OE style rubber core shim: The industry's best pre-attached multilayer shims ensure the highest quality of bonding between rubber and steel, resulting in lower noise, increased strength, and corrosion resistance; Friction material: Rigorously formulated and tested by Bosch's engineers, the friction material in the QuietCast line is meticulously engineered to achieve superior performance; Powder-coated backing plate: Prevents rust and corrosion for increased product life of the brake pad.