Inertsil C8-4 Cartridge Guard Column Ei (Non-metal Type) manufactured by GL Sciences Inc. features 5 µm partical size. The surface area is 450 m2/g and the pore size is 100 Å (10 nm).
Innovative Integra-Guard Columns, Rtx-5, Length 60 m, ID 0.32 mm, df 0.25 μm, Modification: w/5 m Integra-Guard Column, Temp. -60 to 330/350°C, Restek (CAT#: STEM-C-0311-LC)