0.005 x 1.75 inch UPLC Connection Tubing with end ferrules and nuts (2 pack). Note: The 2-piece ferrules are NOT permanently seated on the connector tubing. The ferrules are seated only when installed into a new column for the first time. This helps ensure an appropriate fit into that column. This connector is RECOMMENDED when using a Waters HPLC or UPLC-based SEC column and or guard.