... 3.low cost Diamond Polishing sheet Main feature:*Diamond polish film use on ceramic , stainless steel , plastic and composite ferrule.*Micron ... .*9,6,3,1 um diamond polish film and 0.05 um aluminum oxide polish film are usedin polish process .Specification:Polish ... film O.D.:112 mmFilm micron grade:9 um , Diamond , Blue ( 3M-9D )6 um , Diamond , Clear ...