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Comparison : Item # 468RBI40, 5.0 Millimeter (mm) Dimension L BI40 Aluminum Titanium (Carbon) Nitride (AlTi(C)N) Front Turning Insert
Item # 468RBI90, 5.0 Millimeter (mm) Dimension L BI90 Aluminum Titanium Nitride (AlTiN) Front Turning Insert