Products Search by Part Number Products>Actuators>Linear Actuators>Standard>CQ2>Knuckle Joints CQ2/CQ2-Z, Accessory, Knuckle Joints Single and double rod knuckle joints for the CQ2 series cylinders. Single and double knuckle joints Carbon steel material for bores 12, 16, 20, 25 Cast iron material for bores 32, 40, 50, 63, 80, 100 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 -- G012 (12mm) Z015A (16mm) G02 (20mm) G03 (25mm) G04 (32m, 40mm) G05 (50mm, 63mm) G08 (80mm) G10 (100mm) Options in: Gray are not compatible with other selected option value. Red conflict with another selected option value. Amber are not recommended.