New Energy Suspension coil spring isolator bushings.  These are the "walled" design, meaning the coil spring sits in between 2 walls in the isolator. These are black polyurethane, which is stronger than rubber and has less flex.  View photo #2 for the dimension appendix.  This set is 3 3/16" ID (3.187"/dimension A), 3 9/16" OD lip diameter (3.563"/dimension B), 5 1/4" OD (5.250"/dimension C), 3/8" pad thickness (.375"/dimension D), 7/8" inside lip height (.875"/dimension E), 3/4" outside lip height (.75"/dimension F), 4 7/8" outer lip diameter (4.875"/dimension G).  Sold as a pair (2 bushings).  Universal applications.