Ring shaped marker bands. These are put within the catheter as part of the build process. They are heat bonded to a catheter shaft to provide a high level of visibility under fluoroscopy (radiopacity). (90% by weight platinum, 10% by weight iridium).

GIR 1 AND 6 NOTES TO 7115 AND 7115 90 00 00 NOTES TO HEADING 7115 Excluded from Chapter 90: no specific objective characteristics Note 2(b) to Chapter 90