This unit is in excellent condition, working and tested. Used in a college class for last semester before being replaced for a unit that a new professor was more comfortable with. 4 Capillary Columns: 1 JandW Fused Silica ID#59095, 1 Restek Corp Rtx-Wax, 1 Restek Corp Rtx-65, 1 Restek Corp Rtx-5. For more details and pictures please contact us.