Products Search by Part Number Products>Actuators>Linear Actuators>Stainless Steel Body>CJ2>CJ2-Z, Accessory, Knuckle Joints CJ2-Z, Accessory, Knuckle Joints Series CJ2-Z add on rod end knuckle joints. Accessory: knuckle joints Single or double 10 or 16mm bore size Configuration Options Select Product Options Select values from the drop down lists or make appropriate selections to configure the part number. Type -- Pick an Option -- I (Single Knuckle Joint) Y (Double Knuckle Joint) Size -- Pick an Option -- 010 (10mm) 016 (16mm) Options in: Gray are not compatible with other selected option value. Red conflict with another selected option value. Amber are not recommended.