#1 These are the Front Factory Upper Frame-Spring Isolators for 1984-2001 Jeep Cherokee XJ/MJ & 1993-1998 Jeep Grand Cherokees All Model. These measure about 3/4 of an inch and CAN be stacked for extra lift in the front. I have stacked up to 4 inches for spring lift, along with the other needed parts.
#2 These are the Factory Front Upper spring Isolators. They fit/come off of 1999-2004 Jeep Grand Cherokees, all models. I often stack one extra in the front for an extra inch of lift for a "leveling kit" These are Factory OEM quality parts.
#3 These are the OEM rear upper 1993-1998 Jeep Grand Cherokee ZJ Spring Isolators. These are NOT stackable.
