This is the small, yellow #2 disc repair pad for all RTI Machines (Eco Junior, Eco Smart, Eco Senior, Eco Master, Eco Auto Smart, and the Eco Super) for repair of Single Sided DVD"s, Games and CD"s. Not for use with Double Sided discs. * Repairs approximately 40-50 discs per pad. * This pad works only with the resurfacing machines, it will not polish the discs without the machine.