HALO 160 Å ES-CN, 2.7 µm, 0.5 x 150mm

Poroshell 120 EC-C18,2.1x 75mm,2.7um,T

HALO 90 Å C18, 2.7 µm, 3.0 x 5mm, Guard Column 3p

HALO 1000 Å ES-C18, 2.7 µm, 2.1 x 5mm, Guard Colu