Cork Stopper, 10-Pack Biology_Cell Biology sized for materials-science comparison of

sized for materials-science comparison of composition and properties

Hexagonal hollow stopper in borosilicate glass features 29/32 cone with round end for sealing ground joint vessels and chemistry apparatus

especially in procedures involving DNA

Stopcock with standard ground joints features 19/26 socket size in borosilicate 3

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

Cork Stopper, 10-Pack Biology_Cell Biology sized for materials-science comparison ofNatural cork bark stoppers with a tapered profile seat into a range of bottle necks and flasks for general purpose non reactive closure.