Show your users how much stock is available without showing how much stock you carry.
We use a battery icon to indicate the inventory levels of an item.
Using the battery icon requires a few things to be set on your catalog items:
The current Qty. On Hand is greater than the Max Qty. On Hand.
The current Qty. On Hand is greater than the Min Qty. On Hand, but less than the Max Qty. On Hand.
The current Qty. On Hand is greater than 0, but less than the Min Qty. On Hand.
The current Qty. On Hand is 0 (or less than 0 if on Backorder).