Cork Stopper, 10-Pack Biology_Cell Biology Entry-level two-part human skull model

Entry-level two-part human skull model separates the skull cap to reveal the cranial cavity for introductory head-anatomy teaching at secondary and college levels

stored in a wooden block for suspension from spring balances and pulleys in physics labs

this wide-mouth LDPE wash bottle delivers controlled flow through a self-venting leak-proof nozzle

and bulk liquids that attack uncoated metal

sized for materials-science comparison of composition and properties

Cork Stopper, 10-Pack Biology_Cell Biology Entry-level two-part human skull modelNatural cork bark stoppers with a tapered profile seat into a range of bottle necks and flasks for general purpose non reactive closure.