Up for sale is a pair (2) of PowerTrix Nissan-specific Hub-centric wheel spacers, bolt on style. I purchased these when PowerTrix offered an introductory special on these spacers, and I picked up a set of 20mm and 25mm, because I didn't know what size I wanted to go in the rear.
These spacers have never been driven on - I mounted them on one side and put the wheel on, and immediately decided that I wanted to go 25mm in the rear. So pretty much, brand new. 25mm gives the rear stock sport wheels a slight poke outside the fender - the look I wanted. 20mm made it sit JUST inside the fender - good for lowered cars, that's for sure.
The spacers are very well manufactured, with very strong 10.9 studs pressed into them. I have been driving with the 25mm spacers in the rear by them and have had no fitment, vibration, or any sort of issues with them.
I'm letting these spacers go for $75 shipped via USPS Priority Mail to the continental US. This is much less than bolt-on spacers offered by H&R, Project Kics, etc, and they function just as good.
Something to note: Some members have had luck using bolt-on spacers in the front, but be careful - I had to go stud replacement in the front due to me having too long of stock studs for a simple bolt-on application. The rears were no issue. I presume since the rear rotors have a different geometry due to the parking brake assembly.