I-Polypropylene ixhaphazi ngamachiza kunye nezinto ezikhetha iisampulu ezinzulu ze-pH, isodium okanye uhlalutyo lwentsimbi enzima.
I-3. Iindidi zepta: ptfe \ / Silicone, ptfe \ /licone \ / ptfe seppu, i-ptfe septa, i-slit-sepga ukukhetha.
> Inqaku le-Vials libhale-kwibala kunye nokuphumelela kwi-0.5, 1.0, kunye ne-1.5ml ekhoyo.