SUPELCOSIL LC-18-S columns are designed for reliable separations of deoxyribonucleosides and ribonucleosides.. Parameter: =70 °C temp. range. Application(s): HPLC: suitable. L × I.D. 25 cm × 4.6 mm. . . Sigma-Aldrich 58928-U SUPELCOSIL LC-18-S HPLC Column, 5 µm Particle Size, 4.6mm ID, 25cm Length. Country of Origin : United States. Part Number : 1195R23EA. Pack of : 1.