The 9mm screw Vial Cap ikhoza kukhala ndi kutsegula kwaulere kwa autosambirr ndi gawo lokhazikika, kapena limatha kukhala ndi nsonga yolimba yosungira zitsanzo. Captalylene cap ndi diaphragm imapezekanso. Zida zobowoleza izi zimapangidwa kuti zizigwiritsidwa ntchito nthawi imodzi, ndipo chifukwa kulibe zisoti ndi zisindikizo kuti zisonkhane, nthawi yokonzekera zitsanzo imachepetsedwa.