0.25 x 3.5 x 0.75. "Urinary sphincter- artificial. Prostheses and Implants. One artificial sphincter example made of latex and loose in plastic bag marked "Artificial Urethral Sphincter Heyer-Schulte Corporation. 5377 Overpass Road. Santa Barbara CA. 93105. 805-964-4741. The artificial sphincter was developed by the Medical University and first implanted by Dr. F Derrick and later patented by NASA."