Guttering is the collective term used to describe the drainpipes, gutters, scuppers, and collectors fitted to the outside of a building to drain off rainwater. In early times these systems were most often installed to collect valuable 'clean' rainwater for domestic use.
This is exactly the kind of detail often missing in many of the building kits now on the market. This kit was designed to give some of the basic units needed to give the indication of external gutters and downspouts. They are also great details to add to a heap of rubble in the corner of an urban combat diorama.