CK Boring Shank Reducer Extension CK5-3-72CK Boring Shank Reducer Extension CK5-3-72SKU: CK5-3-72$150.00PriceOut of StockCK TypeCK5-3-72mmDimension D1 (Big Side ID)18Dimension D2 (Big Side OD)31Dimension d1 (Small Side OD)28Dimension d2 (Flange OD)50Dimension L (Total Length)72