HALO 1000 Å Diphenyl, 2.7 µm, 4.6 x 75mm

HALO 90 Å PAH, 2.7 µm, 4.6 x 50mm

HALO 90 Å ES-CN, 2.7 µm, 3.0 x 30mm

HALO 1000 Å C4, 2.7 µm, 3.0 x 5mm, Guard Column 3