The Wakopak® Navi Series is a packed column for revers-phase HPLC consisting of 3 types of highly purified spherical silica gel with a particle diameter of 5 μm, modified with an octadecyl group (C18), a docosyl group (C22), and a triacontyl group (C30), respectively. Different alkyl chain lengths further broaden the application to HPLC.