One of the factors of polishing comes from the backing. A softer backing would normally provide lesser cutting but gives a better finishing while a more rigid backing would generally give more cutting but a poorer finish. It is of personal preference to the user whether one wants a softer backing or a rigid one and this Foam Interface gives user that choice.
To be inserted between the backing plate and pad to provide a softer backing.
160mm Diameter x 10mm Thickness
Hook and Loop