Brand: SureMotion Item: Drive coupling hub Material: Aluminum alloy Requires: DC-DDS19 torque disc Outside Diameter: 19.1mm Bore Diameter: 1/4in Attachment Style: Clamp Overall Length: 25.9mm Coupling Type: Oldham Rated Torque: 1.7 N-m Maximum Angular Misalignment: 1.5 degrees Coupling Size: 19 Maximum RPM: 3000 Maximum Parallel Misalignment: 0.41mm SureMotion drive coupling hub, Oldham, aluminum alloy, clamp, size 19, 1/4in bore. Requires DC-DDS19 torque disc.