This is a decaling station for Microscale Micros Set & Micro Sol bottles. The two large circular holes are for these bottles. The two smaller holes next to them are for the micro brushes used to apply the individual solutions. The square holes are for storing extra supplies or tools, such as cotton swabs and tweezers.

The large retangular hole in the front can be used as a well for water, or better still a wet sponge. It was designed to hold a common cellulose sponge available at Amazon, Target or other retail outlets