Is it possible to show the label only if the product qty is in the specific range?
Yes, we can configure the following fields under the Qty Range tab section.
- Product Qty From: set the starting qty
 - Product Qty To: set the ending qty
 

This label will be displayed to products that a minimum available qty 100.
- Product Qty From: 100
 - Product Qty To: blank
 

The label will be displayed to products that have a minimum qty 500.
- Product Qty From: blank
 - Product Qty To: 500
 

The label will be displayed to products that have a qty from 100 to 500.
- Product Qty From: 100
 - Product Qty To: 500