Products Search by Part Number Products>Actuators>Linear Actuators>Compact>RQ>RQ, Knuckle Joints RQ, Accessory, Knuckle Joints The RQ series add on rod end knuckle joints. Accessory: Knuckle Joints Types: Single and Double Applicable Bore Sizes: 20mm, 25mm, 32mm, 40mm, 50mm, 63mm, 80mm, 100mm 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) Applicable Bore -- Pick an Option -- G02 (20mm) G03 (25mm) G04 (32mm, 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.