Rat Brain Cortex Astrocytes are obtained from rat brain, passaged once and prepared as cell suspensions for shipment on dry ice. Each vial contains approximately 1 million cells. Astrocytes can be easily thawed and cultured. Astrocytes can be harvested and re-plated or stored frozen for later use. The cells are shipped overnight. Product Link: http://www.creative-bioarray.com/Rat-Brain-Cortex-Astrocytes-CSC-C8051L-item-40254.htm