The product consists of:

1 each Partisil™ 10um SAX 250 x 4.6mm id Standard Analytical HPLC Column
1 each Solvecon™ pre-Column kit for above: 15g Solvecon™ silica, empty 250 x 4.6mm id column (including frits), 2 each nuts & ferrules

This pre-Column is designed to be a Solvent Conditioning Column, like the old Saturation Columns that go inline between the Pump and the Injector.  It helps to Saturate the Mobile Phase with Silica and minimize Analytical Column Dissolution problems for the Whatman SAX columns.