Recommended for use as animal jars or for other purposes where resistance to hot air and steam sterilization is of importance. These jars are blown with walls approximately 4.5mm (3/16") thick. The open ends are finished with a fire-polished bead to increase mechanical strength. Jars listed under CG-8656 can also be used as animal jars. Do not use with heat, pressure or vacuum applications. Not intended for vacuum applications.