yes, and no.
The jr harold does use the jr gent II series bushings.
The jr. emperor and jr abraham (and possibly others) use a different bushing.
You can determine what bushings you need by simply measuring the pieces (components) you are going to mate with. The body of the jr. emperor is straight, both ends are the same diameter. The Jr. GentII slopes, with the nib end being larger than the finial end.
All the Juniors have a cap that is straight, same diameter on each end.
Hope that helps,
Ed
Also answered your question on our website, found lots of others I will have to answer tonight--haven't looked at that in a couple weeks--Sorry!!