From their announcement:
Create your own Modern City with this fourth part of a huge Map.
This set contains a group of 6″x6″ street modules to build an outdoor Car Park with a green park for a total of 24″x30″ map. Many items are integrated here but this set can be enhanced with other items if you purchased Shuffler.
Each module contains a grid of 1″ squares. The map fits 28mm miniatures but can also printed in smaller scales to fit 15mm miniatures or even less.
Included in this 20 pages set of pdfs, you will find the smp source file that can be loaded into Shuffler to modify or add more objects, tiles, effects and much more.