The 9mm screw cap cap, e entsoe ka thepa ea boleng bo holimo, e fana ka nako e telele le ho hanyetsa lik'hemik'hale. Khoele ea eona e nepahetseng e lumella ho tiisoa ha bonolo le ho sebetsa hantle, ho netefatsa ho koaloa ho tšepahalang ha linkho tsa HPLC. Septa, e entsoeng ka thepa e khethehileng, e fana ka inertness e nepahetseng le ho lumellana le mefuta e mengata ea lisampole, ho netefatsa liphello tse nepahetseng le tse ka hlahisoang tlhahlobo ea HPLC.