Reddit reviews Mitsubishi Pencil Uni Colored Pencils 72 Colors Set
We found 2 Reddit comments about Mitsubishi Pencil Uni Colored Pencils 72 Colors Set. Here are the top ones, ranked by their Reddit score.
Carefully selected fine particulate pigment with excellent color purityDesigned with high color saturation and transparencyAlso clear or pale neutral color subtle
http://www.amazon.com/Mitsubishi-Pencil-Colored-Pencils-Colors/dp/B001BN0SI4
The actual pencils they are concerned about are the Hard Type Pencils and they are all but gone except for Red, which you can find here. They are not to be confused with the Mitsubishi Uni Color Pencils which can be found in 100-, 72-, & 36-color sets on Amazon.
The key visual difference you'll notice is the Hard-type pencils are hexagonal shaped like normal pencils and are labeled "Hard" and the Uni pencils are round like a normal colored pencil and labeled "Uni".
Edit: And I believe you're correct that it's the 7700 Series 12-color set.