This Fluidampr friction washer is a single 0.010" diamond-impregnated replacement intended for harmonic balancer installations on 2011–present 6.7L Power Stroke engines. Fluidampr advises replacing the washer each time the damper is removed and pairs it with the appropriate High Strength Bolt Kit as part of proper reassembly.
Fluidampr Ford Powerstroke 6.7L Harmonic Balancer Friction Washer - 1pc