VWR Vwr Stopper White 10/30 Pk100 Unit CS. g. skirted stopcocks stopcock tubes and gas/oil taps) these reliable volumetric glass stoppers provide leakproof performance and are easy to open and close with high chemical resistance. The precision-engineered stoppers are constructed from autoclavable glass phthalate resin and polyethylene (a.i.i.d. resin if applicable) and are designed to remain open for at least 30 minutes. The low-affinity rubber blend of the stoppers provides excellent chemical compatibility with most solvents and organic solvents making them useful in a variety of applications. The low-affinity rubber blend provides excellent chemical resistance with most solvents. You can rest assured these stoppers will remain effective whether you're using them to stop a leak seal a container or anything else. These reliable stoppers are easy to open even with gloved hands and they are reusable with the polyethylene valve intact. Specifications for VWR Vwr Stopper White 10/30 Pk100 20212: Manufacturer: Advantech Manufacturing Color: White Package Contents: VWR Vwr Stopper White 10/30 Pk100 20212 / 89097-552 The VWR Vwr Stopper White 10/30 Pk100 20212 is a quality addition to the Advantech Manufacturing lineup. For more great deals on Laboratory Consumables by Advantech Manufacturing please browse our Advantech Manufacturing Laboratory Consumables page. VWR Vwr Stopper White 10/30 Pk100 20212 Unit CS