Cork Stopper, 10-Pack Biology_Cell Biology stored in a wooden block

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

Equipped with an interchangeable polypropylene stopper (19/26 socket) and a reliable glass key stopcock

and a semi-circular glass block fill this tabletop optics kit

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

especially in procedures involving DNA

Cork Stopper, 10-Pack Biology_Cell Biology stored in a wooden blockNatural cork bark stoppers with a tapered profile seat into a range of bottle necks and flasks for general purpose non reactive closure.