Description Now, sample tubes and storage vials have been joined! Save time and money with the Screw Cap EPR Tube; each come with a PTFE/Silicone Septum. Application Notes *PTFE/Rubber – Laminated discs consisting of a sheath of PTFE bonded chemically to white pharmaceutical rubber. Inert to most solvents and many corrosives. Not recommended for multiple punctures.PTFE/Silicone – Laminated discs consisting of a PTFE sheath bonded chemically to silicone rubber. Inert to most organic solvents and compounds; however, not recommmended for use with strongly corrosive materials. Resealability properties of silicone rubber are excellent.
