The OPTI-GUARD® 3 mm maintains the tool-free connectivity of the 1 mm, but incorporates a cartridge based format to allow for a larger bed with more capacity.

• Hand-tight two-part PEEK/ Stainless Steel holder
• Connecting the holder requires no extra tubing or fittings
• Automatically adjusts to any manufacturer's column
• Perfect repeat ZDV connection
• Minimal impact - no change in efficiency
• Holder stays plumbed when changing cartridges
• Use with OPTI-GUARD® 3 mm cartridges only

The two-part holder is designed for use with any analytical column to provide vital protection from dirty samples and strongly retained contaminants. An auto-adjusting stem conforms to any tube stop depth for a perfect zero-dead-volume connections.

The best way to protect an analytical column from fouling is to install a guard column between the injection valve and the analytical column.