Amazon.com: iLuiz Fret Erasers Fret Polishing Abrasive Rubber Block for Fret wire Strings and Other Oxide Layer of Metal Instrument, Set of 8 : Musical Instruments
Fret Polishing Rubber 1000 - tonefactory.nl
Fret Erasers - StewMac
Amazon.com: StewMac Fret Erasers, Abrasive Rubber Blocks for Polishing Fretwire and Other Metal, Set of 7 Grits : Musical Instruments