Screw cap vials iseselal. Screwing cap inoshandisa mushini yemuchina iyo inotsvedza septum iri pakati pegirazi rim uye cap. Screw kapu inoumba chisimbiso chakanakisa uye nemuchina akabata septum munzvimbo panguva yekuboora. Hapana zvishandiso zvinodikanwa kugungano.
