Accurately laser cut vulcanized fiberboard material. Top and bottom with nickel plated eyelets installed.

Top and Bottom flatwork (BLACK) - .093" (2.4mm) thick. Vintage spec. The holes fit the Mojotone .187" (4.74mm) diameter magnets. Spacing is 2.19" (55.6mm). These fit Mojotone covers. No guarantees as to fit in other products.