Designed for 3 micron and 5 micron particles with sub-3.0 mm ID and shorter column lengths that generate narrow peak volumes. They provide effective, low-dispersion filtering. Although they are not recommended for ultra-high-pressure applications, they can still be safely used at pressures up to 400 bar (6,000 psi). ColumnShield pre-column filters utilize a PEEK finger-tight design that connects directly to any 1/16 inch 10-32 internal thread inlet fitting port, regardless of the manufacturer.