CK Boring Shank Reducer Extension CK4-3-50CK Boring Shank Reducer Extension CK4-3-50SKU: CK4-3-50$120.00PriceOut of StockCK TypeCK4-3-50mmDimension D1 (Big Side ID)18Dimension D2 (Big Side OD)31Dimension d1 (Small Side OD)22Dimension d2 (Flange OD)39Dimension L (Total Length)50