Products Search by Part Number Products>Actuators>Linear Actuators>Compact>MLU>Knuckle Joints MLU, Accessory, Knuckle Joints Plate cylinder with lock series MLU add on rod end knuckle joints. Single and double knuckle joints Available for all bore sizes 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) Y (Double) Applicable Bore -- Pick an Option -- 02 (for 25mm Bore) 03 (for 32mm Bore) 04 (for 40mm Bore) 05 (for 50mm Bore) Options in: Gray are not compatible with other selected option value. Red conflict with another selected option value. Amber are not recommended.