Guard Col 10m 0.25mm 0.0um ,Each

Details:

Intermediate-polarity deactivated guard columns^ 0.25Mm id. 0.37 /- 0.04Mm od. 10-Meter length. Not tested with the grob test mix because of a high pressure drop. 30-And 60-meter lengths are banded in 5-meter sections. Angstroms recommendation: cut 60m guard columns into shorter lengths.