These luer-adapters are compatible with MoBiTec's mobicols and laboratory columns. Both M and F luer-adapters are available. Luer-adapters (M) are inserted into the top-cap for tubing connection to the inlet of the column, allowing a flow-through mode at low pressure. Luer-adapters (F) are attached to the outlet of the column for connecting tubing to the outlet. 20 luer-adapters (M) are included in this pack.