The Sonoma™ line is an equivalent to Phenomenex Luna™. The most popular is the C18(2); ES Industries offers this exact type HPLC column in 3_ and 5_ sizes with bulk and preparative material available. Excellent efficiencies, peak shape and resolution are obtained for virtually all Luna™ HPLC applications. Range of particle sizes offers amazing versatility for capillary and LC/MS to prep and process scale applications.