While many columns use the same nomenclature for their stationary phases such as C18, phenyl, C8 etc, every brand of column has unique properties and in any given method, columns can perform equally and then in another method perform differently. It is the philosophy and belief of MicroSolv Technology Corporation that our Cogent TYPE-C™ columns are unique in the way they perform and therefore, we do not offer our products as equivalents. That is not to say that our columns will not perform equally or better in any method that can be optimized for our columns.