Brand: SureMotion Item: Drive coupling hub Material: Aluminum alloy Requires: DC-JS65 series spiders Outside Diameter: 64.8mm Bore Diameter: 1-1/4in Attachment Style: Clamp Overall Length: 89.7mm Coupling Type: Jaw type Maximum Angular Misalignment: 0.9 degrees Coupling Size: 65 Maximum RPM: 6800 Maximum Parallel Misalignment: 0.23mm SureMotion drive coupling hub, jaw type, aluminum alloy, clamp, size 65, 1-1/4in bore. Requires DC-JS65 series spiders.