12 Standard NTI devices
For general nighttime use, the Discluding Element of the original Standard device must typically be altered by the practitioner for proper vertical dimension and horizontal orientation. Upon final modification, the Standard device will closely resemble the current Upper or Lower device. The Standard device was the original design of an NTI.
12 plastic glow-in-the-dark boxes and an ample supply of ThermoPlasticBeads are also included.