An early diagnostic device for symmetrical polyneuropathy which measures temperature sensitivity of the skin
	
Uses the different heat conduction properties of metal and plastic to trigger a defined temperature sensation. The polymer side feels warmer and the metal alloy side feels cooler due to the thermal conductivity property of the materials
	
Small and handy
	
Practically indestructible
	
No battery source required
	
100mm x ∅15mm 
	
Weight: 43g