Mirror for case feeder is a simple solution for keeping control of quantity of cases inside case feeder.
Case feeder is inherently mounted high, too high for most people to peek into it. You may have to check how many cases you still have in the case feed bowl re-fill or to inspect at any case feed based stoppage.
Now instead of looking out for a chair, ladder or something similar just to have a look, here's a simple and reliable convex mirror which allows you to see every corner of case feed bowl.
The installation takes only few seconds and requires no tools. Just mount on the straight part of edge of case feeder and position the mirror as it fits you.