Production of guard columns and replacement cartridges will end in January 2020.
Therefore, this product is completely gone after the sale corresponding to the stock.
After that, we want you to use the new product “Guard Filter”. This product can be applied to columns from 1.0mm to 6mm inside diameter.
This is the conclusion we made to achieve 100% column performance.
Please open the following PDF for details.
Notice of end of sales of guard columns and cartridges