Macrophages are long-lived tissue resident cells that function to ingest and kill invading pathogens and to direct the ensuing immune responses. Cayman's Macrophage (mouse) Elicitation Kit provides the reagents necessary for eliciting macrophages to the peritoneal cavities of up to five mice and the fluorochrome-labeled antibodies required to assess the populations recovered by flow cytometry. This kit will be useful to immunologists interested in studying monocyte/macrophage trafficking as well as those requiring a source of macrophages for downstream applications.