Brand: SureMotion Item: Drive coupling hub Material: Aluminum alloy Requires: DC-JS65 series spiders Outside Diameter: 64.8mm Bore Diameter: 32mm 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: 0.25mm SureMotion drive coupling hub, jaw type, aluminum alloy, clamp, size 65, 32mm bore. Requires DC-JS65 series spiders.