A variety of products are available for the magnetic isolation of desired cell types. Such tools typically utilize magnetic beads that can bind to key cell surface markers. In the presence of a magnetic separator, cells of interest can then be enriched and collected (positive separation) or undesired cells can be removed or depleted (negative separation). For convenience many devices are provided in ready-to-use kits specific to the cell of interest. Magnetic separators also come in varying formats to accommodate higher experimental throughputs.