ThisProXXS-DF20-20X20 is a single piece of our OEM hard, high-density, small diamond finish, foam as used in the ProX production of road/flight cases. It is designed to be used on the bottom and sides of cases to provide a durable, highly protective barrier to insulate contents from shocks and bumps.10 mm-25/64" thicknessXS-DF10-20X20, 20-mm/1 9/64" thicknessXS-DF20-20X20, 30 mm-1 3/16" thicknessXS-DF30-20X20 and40mm-1 37/64 In. thickness XS-DF40-20X20Images may show multiple thicknesses for comparison purposes only. Each part number is for 1 pc. of the appropriate thickness of the foam.