Superspher® Si 60 is a versatile HPLC spherical silica sorbent with a particle size of 4µm and a pore diameter of 60A for normal phase chromatography. This sorbent is packed into a Hibar® 250-4 HPLC column. For mounting of a LiChroCART® 4-4 guard column, the guard column holder 1.51487 has to be used.