Home :: HPLC Columns :: VDS optilab :: VDSpher PUR Series :: VDSpher PUR 100 Series :: VDSpher PUR 100 C18-H Series (monomeric bonding, polar endcapping) :: VDSpher PUR 100 C18-H - 3.5µm :: VDSpher PUR 100 C18-H 3.5µm, Guard Cartridges 4.0 x 20mm, pk.5