This Sleeve is designed for installation on stock or factory knuckles. The center taper is the stock TJ taper of 1-1/2" per foot or 7.153 degrees.
The ourside diameter is 0.75" to allow for less material loss on the smaller factory knuckle. This sleeve is used when the steering linkage is flipped on top of the knuckles to allow for more clearance with trail obstacles.
Note: this item is to be installed by professionals.