You've selected the spindle with HD spindle bearing kit.

GM small bearing spindle.  For details on the the spindle bearing, use the search feature on our website, enter part number DAN706527X (it's the other drop down) for the standard, or DAN706527X-HD for the HEAVY DUTY.

It's a six bolt spindle that came on 1973 through 1976-1/2 GM six lug front axles.  We use this spindle along with our 5 on 5-1/2 bearing hubs to stick various axles under Jeeps (give us a call and we can put together the proper kit for you if you're not familiar with the process).  We also offer all the parts associated with this spindle (knuckle, bearings, hubs, spindle nuts, etc).
 

Specifications:

OD @ inner wheel bearing:  1.778" (this is the difference between the big bearing and the small bearing spindle)
OD @ outer wheel bearing:  1.622"
OD for the seal:  2.50"
Number of bolt holes:  Six
Overall length:  6.50"