Iyo cap yakagadzirwa nealuminium. Aluminium inowanzo shandiswa nekuda kwekuisa kwaro kusingaenzaniswi zvivakwa uye kuramba kuora. Septa chikamu chakakosha che cap uye chakagadzirwa neSilicone kana PTFE (polytetrafluorolehlene). Iyo yakamanikidzwa mukati mekapu uye inoshanda sechinhu chipingamupinyi pakati pemuenzaniso uye nharaunda yekunze. Iyo cap ine crimp yepamusoro dhizaini, zvinoreva kuti inogona kuve yakachengeteka yakachengeteka kune vial nekushandisa chishandiso chekutarisa. Kuita uku kunosanganisira kurwadzisa cap kutenderedza mutsipa weMutengo, kugadzira chisimbiso chakasimba uye chinotyisa-chinokuoneka. Aya maCAS naScAS ane chipinganidzo chinoshanda nekushambadzira, kubuda, uye shanduko mukuumbwa kwemuenzaniso, kuona kuti muenzaniso unoramba wakasimba uye wakavimbika wekuongorora.