The Primesep guard column is a uniquely designed direct insert column that does not require any additional holders and allows zero dead volume connections with the column. Guards are available for all our packing materials. The packing layer is 10 mm long and is available in 1 mm, 2 mm, 3 mm, and 4 mm internal diameters.

 The Promix guard column is a uniquely designed direct insert column that does not require any additional holders and allows zero dead volume connections with the column. Guards are available for all our packing materials. The packing layer is 10 mm long and is available in 1 mm, 2 mm, 3 mm, and 4 mm internal diameters.

 The Obelisc guard column is a uniquely designed direct insert column that does not require any additional holders and allows zero dead volume connections with the column. Guards are available for all our packing materials. The packing layer is 10 mm long and is available in 1 mm, 2 mm, 3 mm, and 4 mm internal diameters.