Amadeal 15 Piece ER40 R8 Imperial Collet Set. Collet sizes - 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1". The photograph shows the version but this is for the R8 spindle.
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