These bodies have 20 holes machined around them, positioned so that regardless of where you are sitting, there are no ‘blind spots’ and the isotope can always be seen. Another added feature is, because of the holes the bodies are very light. Supplied with a chain and buzzer bracket.
The chain and clip unscrew and can be interchanged with clips or chains of a similar thread.
For replacement isotope see product code 04875.