- Co-57, Rigid Ruler, 160uCi (5.93MBq), used as an aid for anatomical location, integrated with "hot and cold" segments , 170mm overall length, 150mm active length
- Co-57, Rigid Ruler, 80uCi (2.96MBq), used as an aid for anatomical location, integrated with "hot and cold" segments , 170mm overall length, 150mm active length