CK Boring Shank Reducer Extension CK6-4-51CK Boring Shank Reducer Extension CK6-4-51SKU: CK6-4-51$175.00PriceOut of StockCK TypeCK6-4-51mmDimension D1 (Big Side ID)22Dimension D2 (Big Side OD)39Dimension d1 (Small Side OD)36Dimension d2 (Flange OD)64Dimension L (Total Length)51