The Panel 16 Color Vision Test includes 16 test caps and 17 restriction rings with one of the caps being a “pilot”. The diameter of the stimulus area is 1.3" (3.3 cm) and can be reduced by using dark gray restriction rings with an opening of 0.47" (1.2 cm) in diameter. The acrylic case includes a cloth storage pouch. The travel tube comes with a black cloth. Comes with recording forms.