This set contains 11 pages of nice sewer maps and 3 pages of sewer-"equipment" all in one pdf-file.
The graphics are rather simple compared to "Sewer Tunnels" by Edward Bournell, but they have one big advantage. They are absolutly flexible and you can cut and paste them as you like to construct allmost every combination of tunnels you can imagine.
You get one map with all-floor tiles, two with straight tunnels (hor. and vert.), three with every possible bend or crossing, four with pools of different sizes and one big empty pit.
As a "bonus" there are four waste outlets, two ladders and eight footbridges to cut out and assemble.
Comparing to the current "special" price of $1.50 a bargain.