Merck HPLC Guard Column Chromolith RP-18 endcapped 5x4.6mm, 3 columns, monolithic, ready-to-use

All Chromolith columns are made of monolithic silica with a characteristic bimodal pore structure. Chromolith 4.6mm columns have macropores with 2 µm diameter, giving a column efficiency exceeding 80,000 plates/meter. The mesopores are 13 nm (130 Å), the surface modification is octadecylsilan with full end-capping.