The DB-1301 GC column is a (6%-Cyanopropyl-phenyl)-methylpolysiloxane column. The DB-1301 is the equivalent to USP Phase G43. The DB-1301 is a low- to mid- polarity column. Agilent makes more capillary columns than anyone else in the world and our commitment to product reliability and repeatability has raised the level of quality that chromatographers demand. We continue to tighten our performance criteria such as separation efficiency, retention characteristics, peak height ratios, and bleed rates.