*edit* Good Lord, I can't even find the Prothane ones anymore. All I see are 1.5" TJ spacers anywhere. Hmmm... Mine measure 2" exactly. I also notice that they sell regular size isolators. I'm wondering if the 1.5" spacers include an 'isolator' compensation...thus making them measure 2"? I seem to remember my box saying that they were "2", TJ". Interesting.