HALO 90 Å AQ-C18, 2.7 µm, 0.5 x 150mm

Poroshell CS-C18 2.7um, 4.6mm grd 3/pk

Poroshell HPH-C18,2.1x 100mm,4um,T

HALO 1000 Å C4, 2.7 µm, 2.1 x 5mm, Guard Column 3