RTI CD & DVD Stone Water Filter for Use with Most RTI Machines (20 Pack) #RTI-SF-FN21 (Eco-Master, Eco-Smart, Eco Junior, Eco Senior, Eco Auto Smart, Resurfacing Machine, Repair, Resurfacer)
This is a replacement stone water filter for the Eco Junior, Eco Smart, Eco Senior, Eco Auto Smart, and the Eco Super disc resurfacing machines (does not work with the EcoMaster) * This filters work only with the RTI machines, they will not fix the discs without the machine.