Bicyclo(2.2.1)hept-2-ene,5-ethylidene-,polymer with ethene and 1-propene, (5E)-5-ethylidenebicyclo[2.2.1]hept-2, Ethylene Propylene Rubber, DUTRAL® CO 054, ethylene-propylene diene, NORDEL™ IP 5565, NORDEL™ IP 4640, NORDEL™ IP 4640, EPDM Repro, Esprene 512E, Modified Bicyclo[2.2.1]hept-2-ene, 5-ethylidene-, polymer, Nordel IP NDR 3720 P, Vistalon 2504