To help protect your investment and further extend the life of our already-rugged LC columns, Restek offers the patented guard column hardware developed by Optimize Technologies. A Restek LC guard cartridge in an EXP in-line holder is the ultimate in column protection, especially when using online trapping and preconcentration techniques.

Maximum holder pressure: 20,000 psi (1,400 bar)
Swept volume: 1.4 μL (excluding packed bed)