Proxxon Flexible Polishing Pad Sets Proxxon Flexible polishing pad set - No 28295 Silicon carbide in a resilient, flexible compound (no rubber). Especially suitable for working precious metals (gold, platinum, silver) as well as for tool making and castings, and for precision engineering. Shaft 2.35mm. No 28295 Size 14, 14 Pack of 2 Proxxon Flexible polishing pad set - No 28296 Silicon carbide in a resilient, flexible compound (no rubber). Especially suitable for working precious metals (gold, platinum, silver) as well as for tool making and castings, and for precision engineering. Shaft 2.35mm. No 28296 Size 22 Pack of 4