Mouse Embryonic Stem Cell Expansion Media with Serum. This product is also available without Serum Cat# M66101-28E This product would require pre-coated flasks with Mouse Embryonic Stem Cell Extra-cellular Expansion Matrix Cat# E66101-28 and Mouse Embryonic Stem Cells Cat# 66101-28 This product is tissue tested including Stem Cells and is available as 500ml sterile filtered unit. The product is also available as a pack of 6, 500ml unit sizes.