15-425 Chovala Chakuda cha PP chipewa ali ndi gawo la 15mm lakunja, zomwe zikutanthauza kuti ndizogwirizana ndi Mbale zomwe zili ndi kukula kwamutu ndikuwuma. Zikopa izi zimapangidwa kuchokera ku zinthu zapamwamba monga polypropylene. Kapinolipizi ka polypropyylene ili ndi mawonekedwe abwino osindikizira ndipo amaperekanso kukana kwamphamvu kwamphamvu kuphatikiza ma asidi, mowa, malkali, zinthu zamadzi, zodzoladzola, ndi mafuta apabanja. Mphamvu za Polypropyylene zodziwika bwino zimadziwika chifukwa zabwino zimakhudza mphamvu, kuchita bwino, komanso kuperewera.
Njira yolumikizirana yotsatsira imagwiritsidwa ntchito kuphatikizapo polytetrafluoroene membrane ndi mphira kapena silicone limodzi kuti mukhale ndi mikhalidwe yabwino kwambiri ya zinthu ziwirizi. The Polyterafluoro 11ylene wosanjikiza septum yolumikizana ikukhudzana ndi kutsutsa. Ndikosakhazikika komanso kugonjetsedwa ndi asidi, alkali, kutentha, ndi komiti. Sichigwira ntchito ndi asidi wokhazikika, alkali, kapena oxidals amphamvu ngakhale kutentha kwambiri. Nthawi yomweyo, zotupa za rabara kapena sicone wosanjikiza zitha kuonetsetsa kuti kusindikiza.