HALO 90 Å AQ-C18, 2.7 µm, 2.1 x 30mm

HALO 90A PCS C18, 2.7um Guard Column 4.6mm x 5mm

Poroshell 120,SB-C18, 3.0x50mm,2.7um

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