Figure 2.
Micrographs of the inner surface of (A) polyvinylchloride (PVC), (B) polytetrafluoroethylene (PTFE), and (C) thermoplastic olefin (TPO) tubing.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.