These Isolators are similar to HDRB isolators. However, LRB insulators have more energy dissipation rate and damping coefficient by using one or more lead cores. The lead used (with a purity of more than 99.90%) has the ability to absorb energy when exposed to plastic deformations. In addition, after plastic deformation, it can show the first feature as a result of recrystallization. As a result of these properties, it can withstand unlimited cyclic loads.