The Guard Column Holder can be used with any guard column in the range of 1.0mm – 4.6mm ID. In addition to the holder and guard column, you will need a coupler which is used to connect the guard column holder to the analytical column. We do not suggest using these guard columns with analytical columns outside of this size range. 

For smaller ID columns we recommend using an inline filter such as 49650-005. Inline Pre-Column Filters