CK Boring Shank Reducer Extension CK6-3-56CK Boring Shank Reducer Extension CK6-3-56SKU: CK6-3-56$175.00PriceOut of StockCK TypeCK6-3-56mmDimension D1 (Big Side ID)18Dimension D2 (Big Side OD)31Dimension d1 (Small Side OD)36Dimension d2 (Flange OD)64Dimension L (Total Length)56