The Part Number is 120-70 and was designed for the fury extreme or any other X-Cell using the CNC headblock 844 and plastic blade grips...

It includes shims to stiffen the damping, thrust bearings and a circlip'd axle...

You can find more details at http://www.x-cellrchelicopters.com click x-cell news and look at 2002 edition 2, all the details are there...